New Evidence and New Methods for Analyzing the Iranian Revolution as an Intelligence Failure
Matthew Connelly,
Raymond Hicks,
Robert Jervis,
Arthur Spirling 1

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“I think that the rapid change of affairs in Iran has not been predicted by anyone
as far as I know.”
Jimmy Carter, January 1979 2

Revolutions are complex phenomena, and a well-planned coup – by definition – may be
impossible to predict. 3 But this does not make such intelligence failures any less embarrassing
for public officials. Analysts therefore hedge and qualify their assessments, while policymakers
claim warnings were ambiguous or came too late. When much of the official record is classified,and even declassified documents can be interpreted differently, it can be difficult to assign
responsibility decades after the fact. Analyzing intelligence on a regime change also requires
applying knowledge from several fields, including international relations theory, 4 the study ofbureaucratic agencies, 5 political psychology, 6 studies on intelligence, 7 and the history ofparticular states.
Within this broad literature, the failure to predict or prepare for the overthrow of the Shahof Iran is a prototypical example. After the 1979 Iranian Revolution, the U.S. lost its strongest
ally in the region, listening posts along the border of the Soviet Union, and – in the Shah -- adiplomatic partner who had long worked to support U.S. interests around the world. It was the
beginning of a series of regional crises that continue to the present day. But even now there is noconsensus about how and why policymakers were taken by surprise. Instead, there are many
contradictory versions of these events, and the release of new information from once-secretrecords has not settled the debate.

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Hard though it may be, it is vital that we try to clarify what happened, and why, not least
because prospect of regime change in Iran is once again a factor in U.S. foreign policy. This
paper introduces new evidence and new methods for analyzing intelligence on the Iranian
Revolution, but using approaches that might have more general applicability. While previous
accounts of the Iran case – many by participants – are essential for understanding this episode,they also illustrate how qualitative approaches might not reveal the whole story. We therefore
complement the close reading of memoirs and individual documents with novel computational
analysis of political reporting in the aggregate, including metadata from still-classified State
Department cables to and from the embassy in Tehran.
We pose three core questions, breaking down the process of reporting, reaction, andpolicymaking. First, is it true that policymakers were not warned about the growing politicalunrest that would culminate in the Shah’s downfall? We show with traffic analysis that, in fact,
State Department officials in Iran were alert to the political protests, but did not press for highlevel attention until September 1978. We find that it was not until two months later -- when theambassador explicitly warned that the Shah was likely to lose power -- that policymakers inWashington became more responsive, both in absolute terms and relative to how they responded
to other embassies during the same period. Though more difficult to answer conclusively, we
also ask if the language of the reports may have misled policymakers as to the seriousness of thethreat, to the point that it required reconsidering a longstanding assumption that the Shah would
retain power. Analyzing the content and sentiment of the cables, we find again that Washington
was slow to respond, but by the time reports from Iran reflected the severity of the crisis, it may
have already been too late. Together we find that viewing the Iranian case in the broadest
possible context reveals that policymakers were not receptive to warnings indicative of dramatic3

changes in Iran. They may well have ignored such warnings even if they came from intelligence
analysts rather than foreign service officers.
Defining and Conceptualizing Intelligence Failures
This analysis requires taking a broad view of intelligence failures, starting with how wedefine intelligence. Traditionally, studies of this subject have focused on the work of analysts at
bureaus and agencies that make up the Intelligence Community (IC). In the political and legal
context, there are good reasons to define and delimit the scope of the IC, and distinguish the roleof intelligence analysts from that of operators and policymakers. But for purposes of scholarly
research, reconstructing events after the fact requires we take into account all pertinent reports
provided to senior decisionmakers, including those from diplomats posted abroad. As Sherman
Kent observed, foreign service officers have long been important gatherers and producers ofintelligence, and diplomatic cables can be almost indistinguishable from IC reports. “The foreign
service officer, although not specially trained as an intelligence man, is by nature of his locationand talent often a valuable and effective purveyor of intelligence.” We will see that seniordecisionmakers included State Department cables along with IC analyses in assessing the qualityof information that was available to them. 8
Similarly, failure in intelligence is not definitionally attributable only to intelligence
analysts. Operators and policymakers may also bear responsibility. Analysts are less likely todeliver reports on a given subject if they find such reports are ignored. Decisionmakers can also
make such reports less likely if, as a matter of policy, they prevent analysts from using certain
sources, or discourage them from asking certain questions. Moreover, intelligence on national
security threats cannot usually be reduced to a binary: warning/no warning. Debates aboutcanonical examples of intelligence failures, such as the collapse of the Soviet Union, and the49/11 attacks, center on the timing, frequency, and specificity of reports, and whether
policymakers were sufficiently responsive to them. A key challenge – one this paper addresses
head-on -- is to develop more rigorous and replicable means to assess specificity andresponsiveness, and tease out the direction of causality in these complex and interactive
relationships.
Before setting out our theoretical framework, we acknowledge that we have only
observational data, and demonstrating causal claims so long after the fact is difficult, especiallysince some of the communications remain classified. But given the likelihood that the historical
record will always be incomplete, it is all the more important to devise approaches thatincorporate all available data. Even if regime change will always be somewhat unpredictable,
such data and methods can be combined with qualitative approaches to clarify the nature andextent of past and future intelligence failures.
Our approach is based on a principal-agent model. Principals (policymakers) depend on
agents (analysts), but they have different perspectives, different incentives, and may mistrust one
another. Both are incentivized to avoid the perception of having failed, which makes
miscommunication more likely. Both are also vulnerable to cognitive biases 9 and “information
overload.” 10 When they share these faults, it can be even more difficult to determine ultimate
responsibility for the outcome. But if we break down the components of the process, we can test
hypotheses to reveal both what worked and what did not work. A comprehensive understanding,
after all, requires an analytic frame that can explain success as well as failure, and account fordifferent kinds of failure. 11
First, the role of providers is to collect, interpret, and relay information in an
unambiguous and timely manner. An intelligence failure could arise because providers do not5collect the right information, collect relevant information but do not analyze it correctly, or fail
to communicate potentially useful analysis quickly or clearly enough to affect the outcome.
Policymakers should specify what information and analysis they need, provide feedback
about what they are provided, and take action when the information warrants it. Here again,
failure can occur at any point. But it is often because of the interaction—or lack of interaction—
between providers and consumers. Providers typically have greater expertise and direct
knowledge of their particular situation. But consumers are ultimately responsible for using
information and making decisions about multiple situations simultaneously. 12Intelligence failures therefore take many forms. There might be in-fighting or a lack ofclear responsibility between bureaucratic agencies responsible for gathering intelligence and thenature of politics makes the bureaucratic structure difficult to reform. 13 Important information
may be discounted because of the source, or a signal may be lost in the noise. Analysts may
become over-reliant on foreign government officials who understate regime threats, and fail to
pay attention to regime opponents. Providers and consumers of intelligence find it difficult toovercome preconceived notions about actors and their incentives. 14 Before the Yom Kippur
War, for example, individual analysts dismissed the potential for attack based on pre-existing
views that underestimated Egypt’s capabilities. 15 Relatedly, since “more of the same” is usually
the safest prediction, analysts find it difficult to recognize the potential for sudden change. 16
Beyond these biases, there are cognitive and career constraints too: analysts may equivocate forfear of committing and being wrong, especially in the face of overwhelming information flows.
This does little to help policy makers prioritize. Even post-mortems held after an intelligence
failure have implications for future failures. 17

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Guiding research questions
When analyzing an intelligence failure then, we should examine each link in the chain. In thecase of the Iranian Revolution, we look for answers to the following questions:
1) Did analysts warn Washington about growing political unrest?
2) Were policymakers responsive to political reporting from Tehran?
3) Did producers of political reporting accurately portray the seriousness of the threat?
These questions capture basic intuitions about what “good intelligence” 18 should look like.
There is a dependency structure here, where analysts bear the initial responsibility to intensify
reporting on political developments during periods of instability. An intelligence failure could
still occur if policymakers are not responsive or proactive in seeking timely information. But
they may not react because analysts have failed to signal the seriousness of the threat through thelanguage and substance of their communications.
To be sure, it is unclear and perhaps unknowable whether the U.S. could have stopped the
Iranian Revolution even with good intelligence. We acknowledge that there are some fascinating
counterfactual questions that we cannot answer with our data. Instead, we will focus on the
aspects of the Iran case that historical analyses agree to be important, and whether, and when,
they were first recognized, reported, and factored into policymaking. Beyond this substantive
contribution, we will lay out a portable methodological framework for quantitatively evaluating
what producers of intelligence are actually producing, and whether consumers are actuallyconsuming it.
Participant and Scholarly Analyses of the Iranian Case
Scholars generally agree on the basic timeline and key events of the Iranian Revolution.
The first sustained demonstrations against the Shah began in fall 1977. They flared up in January7

1978, and again in August, when protesters called for the return of Ayatollah Khomeini fromexile. The Shah declared martial law on September 8, and formed a military government on
November 5, amidst increasingly violent protests and crackdowns. On January 16, 1979, theShah left Iran for Egypt. Khomeini returned from his exile on February 1, and Iran became an
Islamic Republic shortly after. The Shah was admitted to the U.S. on October 22 for medical
treatment. On November 4, 1979, revolutionaries seized the U.S. embassy in Tehran, taking
embassy staff hostage. The last of the hostages were not freed until January 20, 1981, Carter’s
last day in office.
US intelligence agencies’ interpretations of events on the ground proved less thanprescient. They did not foresee the demonstrations in 1977, and even a year later the CIA
claimed that “Iran is not in a revolutionary or even a prerevolutionary situation.” 19 After thedeclaration of martial law and subsequent riots, the Defense Intelligence Agency concluded that
the Shah “is expected to remain actively in power over the next ten years.” 20
The fall of the Shah and the seizure of the American embassy were thus shocking. As
early as November 1978, the American media were criticizing the Carter administration forbeing caught by surprise and “giving more weight to the shah’s secret police than any of its othersources.” For his part, Carter wrote a note to National Security Advisor Zbigniew Brzezinksi,
Secretary of State Cyrus Vance, and Stansfield Turner, CIA Director, in mid-November
complaining about the quality of political intelligence reporting from Iran. 21
After the initial shock, officials were quick to defend themselves. One of the first was theAmerican ambassador, William Sullivan. His leadership of the embassy had come under heavy
criticism. In his 1981 memoir, Mission to Iran, Sullivan admitted that “we did not see thebeginnings of a revolution” but noted that American diplomats reported mounting opposition as

8early as spring 1978. 22 Sullivan argues that it was officials in Washington who failed to respondto these reports and claims that the non-response to a November 1978 cable titled “Thinking theUnthinkable” was particularly indicative of this heedlessness. In it, Sullivan described the
profound challenges facing the Shah, and suggested that the U.S. might be better off bolstering
the moderate opposition and preparing itself to accept a new, less friendly regime. Carter wasangered by the message, and demanded to know why he had not been better informed.
According to Sullivan, Carter had not been paying attention. 23
Gary Sick, Iran specialist in the National Security Council, offered a sharply different
account. In his own 1985 memoir, Sick blamed Sullivan for his “very optimistic reports,” thatleft Washington unprepared for the crisis. 24 He argued that early warning signs were “overlooked
entirely in embassy and other official government reporting until much later.” 25 A key problem
was the embassy’s lack of contacts outside the Shah’s entourage, the Western-educated elite, andmilitary and security forces. 26
Sick’s boss, National Security Advisor Brzezinski, offered a similar account in his 1983
memoir: “[T]he Iranian crisis had been germinating throughout the year, but the recognition of it
was slow to mature. Our intelligence as late as the fall of 1978 was predicting political continuity
in Iran.” 27 Brzezinski credited Sick with having had a more pessimistic view, which was what
prompted him to open a back channel to Iranian Ambassador Ardeshir Zahedi. It was this seriesof direct dialogues with Zahedi—not reporting from U.S. officials in Iran—that convinced himthat “the Shah was in trouble.” 28
Secretary of State Vance admitted he did not foresee the threat to the Shah, but in his own
memoir claimed that it was because he was not warned: “We were assured by the judgement of
the ambassador, the experts in the State Department, the CIA, and other agencies and foreign

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governments that even though he might be required to make political compromises that would
dilute his power, the Shah was not in serious danger.” 29
Not everyone involved wrote a memoir, but even those who didn’t had their defenders. In
a classified study for the CIA journal Studies in Intelligence, Allen H. Kitchens argued that
Agency officials “compiled a substantial amount of accurate information and analysis aboutmajor events, particularly the demonstrations and riots.” He agreed that they did not pay
sufficient attention in the first quarter of 1978, and until March 1978 there was no direct contact
with the religious opposition. But he emphasized that it was senior policymakers who preferredto think that the Shah had staying power. 30
The scholarly literature is also characterized by divergent accounts. Jervis was the firstoutside researcher to have access to classified political reporting as part of a post-mortem hewrote for the CIA. He found not only that CIA officials in Iran provided “little information about
the opposition,” 31 but that more senior officials did not typically read what analysis they did
provide. Moreover, Agency officials were unaware of the problem even as late as August 1978,
when they described reporting on Iranian domestic politics as “first rate.” 32
Based on his reading of contemporary accounts, memoirs, and interviews withparticipants, James Bill argued that, contrary to Vance, at least some mid-level State Department
officials understood by mid-summer 1978 that the Shah’s troubles required rethinking the U.S.Iran relationship. But he found that “the American foreign policy establishment was badly
divided over the Iranian situation, and the major actors were involved in a tangled web of
personal and policy rivalry.” 33
In a recent historical study based on newly declassified documents, Javier Gil Guerrero
wrote that the State Department recognized even before Carter became president that intelligence10

on the Iranian opposition was inadequate. He credited Sick and a U.S. diplomat in Tabriz withrecognizing the religious dimensions of early protests, but this concern was not taken up byothers or recognized as part of a troubling pattern. 34
Other scholars have also used declassified State Department cables to examine the rootsof the failure. The general consensus is that while there was reporting on the protests from Iran,policymakers did not take such warning seriously. Daughtery, for example, suggests that budget
cuts and fear of alienating the Shah hindered the collection of intelligence on the Iraniansituation. 35 Donovan, on the other hand, finds that intelligence from Iran was good, but was
ignored by policymakers because it went against their preconceived notions. 36
Bar-Joseph is the only scholar who has examined the U.S. response in a comparative
context, contrasting the US response with that of Israel’s. As do other scholars, he emphasizes
the lack of local contacts among US officials, arguing that Israel’s relations with local officials
gave them greater knowledge and led them to be better prepared. Nevertheless, as late as thesummer of 1978, Israeli estimates were that the Shah would remain in power for at least a coupleof years. 37
Thus, scholarly accounts and the memoirs of participants emphasize very different
reasons why the Carter administration struggled to understand and respond to the Iranian
Revolution, whether organizational factors, cognitive biases, or divided attention. But they doagree that rivalries and bureaucratic infighting, especially between the National Security Council
and the State Department, poisoned the atmosphere and inhibited clear communications. They
also agree that the most senior officials were preoccupied with other things. And these officials
had a strongly-held belief that the Shah was very secure in his position, a belief that was slow tochange in part because the U.S. had come to depend on him and lacked good alternatives.

11But a close reading shows that these accounts disagree about what might seem like basic
facts, including whether analysts offered any timely warnings that the Shah was in trouble,
whether officials in Washington heeded such warnings, and whether anyone appreciated theimportance of religious leaders in inspiring and leading the revolution. Even the same accounts
sometimes offer conflicting assessments, such as Sick’s claim that early anti-secular protests in
Qom were “overlooked entirely” 38—which is contradicted by several contemporary reports 39—
and his assessment that information coming from the embassy in Tehran was either “extremely
meager” or “voluminous.” 40
The accounts of participants and scholars therefore provide conflicting answers to all of
our questions, but they almost all make observations about the quantity of political intelligencereporting. As we shall see, they also note whether, and when, this reporting uses particular words
or types of language. Now that much of that reporting has been declassified and made available
in machine-readable form, we can analyze the text as data, offer precise measures for theseobservations, and finally establish some basic facts.
Iranian Cable Data and Traffic Analysis
This paper mainly uses State Department communications from Iran to analyze theinformation provided to policymakers. 41 Conversely, we utilize outgoing State Departmentcommunications from Washington referencing Iran to show how policymakers responded. The
State Department has released many thousands of records from the years 1973-1979 transmitted
to and from Iran. In addition to the full-text and extensive metadata for these cables, they havealso released the metadata for other documents delivered by diplomatic pouch and more limited
metadata for records that are still classified, including the date, sender, receiver, subject line, anda field called “Traffic Analysis by Geography and Subject” (TAGS). Foreign service officers

12selected one or more of these TAGS for each communication to facilitate filing and retrieval. So
we can apply traffic analysis to nearly all State Department communications to and from Tehran
and other diplomatic posts, and also analyze the text of all the declassified diplomatic cables. 42
Before proceeding, we address two potential objections. First, we do not have access tothe multitude of reports intelligence consumers, specifically policymakers in Washington D.C.,
received from different sources, including special envoys, backchannels, the NSA, and the CIA.
One reason is that, even forty years after the fact, intelligence agencies are loathe to declassify
records that might reveal sources and methods. But we can use CIA documents that reference
Iran released through its automatic declassification program. While we cannot know whether
these records are representative of CIA intelligence on Iran more generally, much less the rest of
the IC, they do offer an interesting contrast with the more complete State Department reports. As
we shall see, they indicate that the CIA was even slower to respond to the deepening crisis.
We believe it is appropriate to focus on the best information that was made available topolicymakers, and there are several reasons to believe that the State Department reporting was
the most consistent and comprehensive. Individual missions to Tehran, such as those of Richard
Helms and General Robert Huyser, could have had an impact. But they were often recorded in
the diplomatic cables and, by definition, a one-off mission did not produce a stream of
information that can be analyzed longitudinally to measure the level of attention or the languageof communications. The back channel with Zahedi became important once Brzezinski decided
the normal sources of information about Iran had failed. But we are mainly focused on the periodleading up to this point. As for the CIA, it only had a few analysts in Iran, and almost none ofthem spoke Farsi. They tended to focus on the security of covert U.S. communications facilities
and the communist threat. 43 The diplomats were more numerous, tended to have better language

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skills, and had an easier time communicating with Iranians of diverse socioeconomic
backgrounds on a range of issues.
Our analysis also addresses when and how policymakers responded. During the main
period under study, i.e. up to November 1978, any such response would have been registered by
the State Department. There have been times when the CIA has been involved with
implementing policy, such as when mounting a covert operation. But normally there werestructural factors that separated CIA analysts from decision-makers in order to prevent thepoliticization of intelligence. During the Iranian revolution, these analysts were not evenpermitted to communicate directly with others working on the same problems, such as Gary Sickof the NSC staff. 44 By contrast, we know that significant State Department cables were
forwarded to the White House, draft responses were discussed and approved at high levels, andthe National Security Council staff devoted time to analyzing State Department reporting while
the crisis was still unfolding.
It is possible that the totality of political reporting from all agencies would present a
different picture. But intelligence consumers were ultimately responsible for recognizing andrelying on the best information available, and none have claimed that other sources had better
reporting than the State Department. Consequently, while we do consider non-State Department
reports, it is neither possible nor necessary to include all of them in the quantitative analysis toanswer our main research questions.
A second objection is that our methods may give undue emphasis to “quantity” instead of“quality.” Like other social scientists who have begun to analyze text as data, we do not see suchmethods replacing a close reading of the documentary record. The inspection and interpretationof individual reports is essential even for validating the results of computational analysis. 45 But

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analyzing all the reports in the aggregate can actually help to highlight the ones that were
unusual. Conversely, discerning the broader patterns helps us to avoid “cherry-picking.”
Computational analysis and a close reading of key documents are therefore complementary
approaches, and each becomes more probing and powerful when the two are combined.
We obtained the data from the State Department’s Central Foreign Policy Files (CFPF),
which are available from the U.S. National Archives. To focus on the Iran-related
communications from the massive CFPF collection for the years 1973-1979 (>3 million), we
first extract all reports from the embassy and consulates in Iran (Tehran, Isfahan, Tabriz, andShiraz). The reports were further categorized in three ways, by date, subject, and format. First,
the main temporal focus of our analysis is the 13-month period between October 1977 andNovember 1978, i.e. from when protests broke out to when the most senior policymakers were
aware of the gravity of the situation and demanding better information. But we will also use theearlier and later periods for comparison. For most of the analyses, we group the communications
by week. The demonstration data we use end on February 14, 1979 which is a Wednesday. To
ensure that the weeks are seven days and correspond with the demonstration data, we start
aggregating our weekly data as of Thursday, December 30, 1976. There are a total of 8,502
reports originating in Iran, and almost all of these reports (8,218) are from the capital.
Additionally, there were 4,846 reports addressed to U.S. missions in Iran, with 4,624 including
the Tehran embassy.
Second, we focus on communications related to the political situation by using original
State Department metadata, such as subject TAGS like PINT (Internal Political Relationships)
and PORS (Public Order and Safety). About a fifth of the records between October 1977 andNovember 1978 have a Political TAG, since communications still covered the full range of15

embassy activity, much of it unrelated to the political situation even as the protests intensified.
For our time period, we analyze 3,036 political communications from a U.S. diplomatic mission
in Iran that included the State Department as one of the recipients and 1,167 that were from theState Department to a mission in Iran.
Finally, for analyses requiring use of the message text, we are limited to communications
where the message text has been declassified and is available in electronic format. But for someof the traffic analysis we can also use “withdrawn” cables, where only the metadata has been
declassified, as well as paper records that were delivered via diplomatic pouch (“p-reel” records),
including those for which the message text is still classified. There are a total of 340 incoming
and 131 outgoing cables without text.

Hypothesis 1: U.S. Officials in Iran Were Not Responsive to Growing Political Unrest
If we only looked at memoirs and individual documents, it would be difficult to establish whenembassy political reporting began to reflect the deteriorating situation in Tehran. For instance,
Ambassador Sullivan claimed in his account that reports from Tehran during his 1978 summer
leave did not indicate any “acceleration in the pace of political activity or any accentuation in the
campaign of dissidence and disorder.” In fact, an August 1 cable reported demonstrations in 13
cities, some of them deadly, and noted that “vocal discontent has increased sharply in Tabriz aswell as in Isfahan.” On August 17, Sullivan’s deputy chief of mission concluded that the Shah
had underestimated his religious opponents. They had become the “centers of political power,”and moderates were too intimidated to challenge Khomeini and his calls for violent revolution. 46
How then can we reconcile such contradictory evidence? The most straightforward way
is to tally political reports and compare them to the increase in the frequency of political protests.

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The resulting graph (Fig. 1) provides prima facie evidence that, in fact, the embassy responded topolitical events, while the response from Washington lagged behind. (The diamonds in the graphcorrespond to the number of demonstrations for the week.)
As with all time-series, we can also look for “breakpoints” — that is, fundamental
changes in the rate of communications that may (or may not) be correlated with substantively
important events. 47 We locate structural changes for the period January 1977 through the end of
1979. We run the analysis separately for reports from Iran and for reports to Iran. For the reports
from Iran, the analysis reveals three breakpoints. The first is between October 10th and 16th
1977, which corresponds with the period when the protests first began. A second break point isin the beginning of September, after protests intensified and Sullivan returned from home leave.
The final break point in the reports from Iran is in March 1979, after Khomeini returned to
Tehran but before the Islamic Republic was declared. There are only two breakpoints in thereports to Iran: at the beginning of September 1978 and then again at the beginning of March
1979, that is after Sullivan returned and again after Khomeini returned, but not when thedemonstrations started.
We can also contrast the State Department reports with the same analysis using CIA
documents. The CIA has declassified almost a million documents covering the post-World War
II era. About 2,000 mention Iran between January 1, 1977 and December 31, 1979, but many are
unrelated to its internal political situation. We therefore limited our dataset to the National
Intelligence Daily, which was a CIA report for the IC. We sum the number of mentions of Iran inthese documents by week and in figure 2 plot the weekly totals against demonstration data.
Whereas cables were “raw” reports from the field, the National Intelligence Daily was afinished product, produced in coordination with other agencies, so we should expect some lag in17

how quickly the same events would be reported. But there was no increase in CIA reporting on
Iran until November 1978, months after the demonstrations had intensified and foreign service
officers raised the alarm. Indeed, the first breakpoint in CIA documents occurs around the sametime as Sullivan’s Thinking the Unthinkable memo (November 1978). There is a period of
increased communications and then a second breakpoint in April 1979, after the Islamic
Republic had already been established.

Fig. 1: Communications with Political TAGS and Demonstrations from the Iranian Revolution.

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Fig. 2: CIA documents and Demonstrations from the Iranian Revolution.
But protests can cause more protests, and political reporting can lead to more politicalreporting, without either being causally related to the other. A more rigorous test of the first
hypothesis requires running a time series analysis to determine if the number of reports from Iraneach week could be predicted from the number of demonstrations. If the U.S. embassy was not
responding then we should find no relationship between the number of protests and the numberof cables.
For the main independent variable, Rasler provides weekly numbers of politicaldemonstrations in Iran from December 1977 to February 1979. 48 In Appendix Figure A1, we plot
the number of weekly demonstrations against the number of cables from Iran to the State
Department.
19For the dependent variables, we employed various measures on incoming reports from
U.S. missions in Iran: all incoming communications (Model 1), Political-TAG communications(Model 2) 49, Political cables with language indicative of unrest (Model 3) 50, and political cables
with mentions of “Khomeini” and “Tudeh” – the Communist party of Iran which U.S. officials
long suspected of plotting the Shah’s overthrow (Model 4). 51
Results are displayed in Table 1. 52 We find a positive and significant effect ofdemonstrations across all the different measures of State Department reports from Iran to
Washington except for cables with Khomeini and Tudeh mentions. Column 1 of Table 1 showsthat an additional 10 demonstrations led to 3.2 additional reports from Iran. In column 2, we lookspecifically at State Department reports with a political TAG. Here, every additional 10 protests
increased the number of political reports by 2.4. Considering that, on average, only about 41% of
the cables were tagged as political, this increase represents a stronger relationship than we findwhen measuring the overall number of reports.

Table 1: Results from ARIMA(0,1,1) Regressions=====================================================================
Dependent variable: Number of reports-------------------------------------------------All Incoming Political
Revolution
Khomeini/Tudeh
3706 commun. 1516 commun. 403 cables
114 cables------------------------------------------------------------------------MA(1)−0.644∗∗∗−0.742∗∗∗−0.681∗∗∗−0.407**(0.100)(0.087)(0.088)(0.200)
Demonstrations
0.315∗∗∗
0.236∗∗∗
0.045∗∗
0.008(0.114)(0.057)(0.023)(0.016)------------------------------------------------------------------------Observations
55
55
55
55
Log-likelihood-232.837-194.323-144.605-121.056
𝜎𝜎²275.668
67.62011.125
4.763
Akaike Inf. Crit.
471.675
394.646295.210248.113=====================================================================
Note:*p<0.1; **p<0.05; ***p<0.01

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Thus, our results contradict the hypothesis that policymakers were not informed about thedeteriorating situation in Iran. The protests had a significant and measurable effect on State
Department reporting from the field, whether in terms of the number and length of their reports,
or how they compare to contemporaneous reporting from the IC. 53
Hypothesis 2: Policymakers did not pay sufficient attention to political reporting from
Iran.
Senior State Department officials and the White House might have decided that the
Iranian issue was not as pressing as other issues. For instance, protests were spreading at thesame time there were high-level negotiations between Israel and Egypt culminating in the CampDavid meetings and eventual agreement from September 5-17, 1978. Because of the highpriority of these talks, Washington officials might have faced an information overload problem
and failed to appreciate the importance of the Iranian reports.
We can test this hypothesis by comparing the ratio of political reports from Iran to
Washington with political reports from Washington to Iran. This can be represented in a 2 by 2
table to distinguish patterns characteristic of communication breakdowns and communication
successes between information providers and information consumers.

Consumers

Consumers

Providers
Succeedsucceed Increase in traffic both from/to
Similar ratio
fail

Increase in traffic only fromproviderHigher ratio

Providers fail
Increase in traffic only fromconsumer
Lower ratio
Little change in traffic volume
Similar ratio21

● If intelligence providers recognized an increased risk of political instability, the numberof communications to the State Department should have increased. If the consumers of
the information correctly interpreted it, they would have responded in kind and provided
continuous feedback. The ratio would not have displayed any marked tendency toincrease or decrease over time, but there should have been a greater flow of traffic
overall.
● If the providers upped the tempo of political reporting but the consumers were not paying
attention, we would expect the ratio to have increased, as the volume of traffic to theembassy and consulates lagged behind.
● If the consumers were demanding more information but the providers were nonresponsive, we should expect a lower ratio as traffic from the U.S. mission in Iran would
have lagged behind.
● If both consumers and producers failed to respond to increasing political instability, we
would expect a similar ratio and a similar volume of traffic before and during the crisis.

More specifically, if there was a communication from the State Department for every
report from Iran, the ratio would be 0.5. But the State Department does not generally send as
many communications as it receives from missions abroad. Across all non-Iranian politicalcommunications, the average ratio was 0.7445, i.e. one for every three. Figure 3 shows how,
before October 1977, there were very wide fluctuations in the ratio. But the State Department
was generally more attentive to Iran than it was to most embassies and consulates, and at times
the ratio of communications to and from Iran was one-to-one. In the key period October 1977 to
May 1978, however, precisely when demonstrations intensified, the State Department became22less rather than more responsive to messages from Iran. In fact, it was less responsive than it wasto the average embassy.

Fig. 3: Ratio of communications from Iran to the State Department and State to Iran. The solid
black line shows the mean ratio for non-Iranian political communications.

This impression is confirmed by the results of Kolmogorov-Smirnov tests to compare theweekly ratios of reports between Iran and Washington with the average weekly ratios of reports
between 100 other major outposts and Washington. The Kolmogorov-Smirnov test examines
whether groups are drawn from the same distribution. In this case, we are interested in whether
the ratio of responses to Iran followed the same distribution during different time periods as the23political communications to other embassies across the world. Unlike the t-test, the KS test will
give the same sign when either group is specified first. It will be recalled that a higher ratio
indicates less responsiveness on the part of the State Department.
In Table 3 we compare the ratios across three periods, as suggested by the breakpoints
found earlier in the analysis. The first period is the 10 months before demonstrations started—from December 30, 1976 to October 12, 1977. The second is the demonstration period—
October 13, 1977 through September 10, 1978, which was about the time Sullivan returned fromhome leave. The final period lasts from September 11, 1978 through April 20, 1979.
In all three periods, the difference between the mean ratios is significant but the directionchanges. In the first and third periods, the State Department was more attentive to Iran than it
was to other embassies. But again, in the crucial middle period, when protests were building, theState Department was less responsive to Iranian communications, and significantly so compared
to its responsiveness to other embassies. 54

Table 3: KS-tests of ratio of communications to/from Iran compared to Political communications
from all embassies.
Period12/30/76 – 10/12/77

10/13/77 – 11/8/78

11/9/78 – 4/20/79

Mean ratio

KS-Test

Iran

0.72

0.44***

Non-Iran

0.74

Iran

0.77

Non-Iran

0.73

Iran

0.71

Non-Iran

0.75

0.50***

0.32*

24

To examine whether there was a relationship specifically with the Camp David
negotiations, we break out all the Political communications between the State Department andIsrael or Egypt. 55 We compare the ratio of these communications to the ratio of communications
from Iran for the same periods as before, as shown in Table 4. Once again, in periods 1 and 3, theState Department was significantly more responsive to Iran than it was to Israel or Egypt, though
the difference is not significant for the third period. During the crucial period when protests werebuilding, it shifted attention to Israel and Egypt, to the point that it nearly equaled the attention it
was devoting to Iran. 56

Table 4: KS-tests of ratio of communications to/from Iran compared to Israel/Egypt

12/30/76 – 10/12/77

10/13/77 – 11/8/78

11/9/78 – 4/20/79

Mean ratio

KS-Test

Iran

0.72

0.41***

Egypt/Israel

0.79

Iran

0.77

Egypt/Israel

0.76

Iran

0.71

Egypt/Israel

0.76

0.19

0.29

As a robustness test, we use as the break between the second and third periods the week Sullivan
sent the “Thinking the Unthinkable” memo. The results are the same except that the third period25comparison between Iran and Israel/Egypt is now significant and the State Department was more
responsive to communications from Iran.

Hypothesis 3: Analysts Missed or Misunderstood the Severity of the Situation
Of course, what mattered most was not whether every communication was getting a
response, since many of them concerned routine or unrelated matters. What mattered waswhether top decision-makers on the seventh floor of the State Department or in the White House
were being alerted and paying attention to the deteriorating political situation, since a reactionthat might have changed the outcome would have required a high-level policy decision.
We can measure whether intelligence providers failed to fully alert Washington to theseverity of the crisis in a few ways. First, the uptick in political reporting might not haveincluded messages specifically addressed to the most senior decision-makers; second,
intelligence providers might have been slow to use words like “revolution”; third, even while thevolume of reporting increased, and occasionally included words indicative of radical change, theoverall sentiment of their cables might have stayed the same.
High-level reporting. In principle, it might not have mattered whether warnings were
issued or received by the most senior officials, since such warnings could have moved up thehierarchy if they were deemed to be important. But in practice, officials flagged communications
intended for senior leadership as “Cat-C” or “Cat-B,” i.e. bearing significant strategic interest,and “Cat-A” for communications with medium strategic interest. Communications marked“Cherokee” were for the attention of the President and/or Secretary of State. As we shall see,such messages were much more likely to elicit a response, especially when they came from the26

Ambassador himself. That the high-level cables did not start until relatively late suggests that
Embassy officials were hedging their bets and not reporting on the seriousness of the situation.
When we count all of these communications, we find a roughly equivalent number ofincoming and outgoing high-level reports before September 1978, and no clear pattern of Vanceor Christopher becoming more or less responsive to messages from Sullivan about the politicalsituation (Fig. 4). But very few of Sullivan’s high-level communications were about the protests,
with none at all bearing the PINS Tag (for internal political situation) until April 1978. Instead,
there were dozens of messages concerning matters like visits by Carter and Menachem Begin to
Iran and the Shah’s role in international diplomatic negotiations.
Sullivan’s April 1978 message regarding internal security suggested Washington should
join in cautioning the Iranian Prime Minister against repressive measures against the political
opposition, and it elicited a quick response from Vance about how he shared this concern. 57 On
May 14 Sullivan again expressed worry that the Iranian government was using heavy-handed
methods, and on June 16 he reported an audience in which a self-confident Shah indicated hewas preparing further liberalization. But neither had CAT or Cherokee high-level designators,
and neither appears to have elicited any response. 58 Instead, Vance and Carter sent multiple
messages concerning the Shah’s help in negotiations over Pakistan’s nuclear program and theIsrael-Egypt negotiations.
After Sullivan returned to Tehran at the end of August, he dispatched a Cat-B cable toVance and Brzezinski proposing that Carter send a message to the Shah recognizing andencouraging democratic reforms. 59 Carter called the Shah, and the White House issued astatement confirming Washington’s close relationship with Tehran. But this did not initiate any
sustained reexamination of the reporting from Iran. It was actually Congress that pressed for27

answers. On September 15, there was a closed door hearing of the Senate Foreign Relations
Committee, where State Department officials tried to explain why they had not been better
prepared for what was happening in Iran. Later that month, the Director of the CIA’s National
Foreign Assessment Center Robert Bowie testified to the same committee that the CIA had had
difficulty learning about dissident groups. 60
Not until the end of September did Sullivan begin to send a steady stream of high-levelmessages describing how the situation was deteriorating. 61 The first time Vance or Christopher
sent even a tangentially related message of their own was September 13, when Christopher wrote
about how they are planning to handle a New York magazine story on Savak activities in the
U.S. 62 There was no sustained attention from the most senior officials at the State Department
about the deteriorating Iranian situation until the end of September, but it did not come close tomatching the messages coming out of Iran. By the last week of October, almost twenty percent
of all State Department messages intended for high-level attention came from Sullivan. But over
95% of Christopher and Vance’s outgoing messages went somewhere else. A smaller percentage
were addressed to Tehran than at several points during the preceding year, such as when Carter
needed the Shah’s help with Pakistan and Israel-Egypt negotiations. When the President andSecretary of State finally began to focus on the Iranian revolution, it occupied an astonishingamount of their attention. For two weeks in December and January, a quarter or more of all highlevel messages coming out of Washington went to Iran.

28

Fig. 4: Proportion of all high-level communications from Iran and from the State Department.

A breakpoint analysis of the high-level reports stream from Iran as a percentage of all
high-level communications confirms that there was no structural change until early September
1978, after Sullivan returned from home leave, and again in late February 1979. The firstbreakpoint in high-level reports from Washington to Iran doesn’t occur until mid-October.
All in all, the data is consistent with the hypothesis that the mission to Iran reacted toprotests by increasing political reporting, but only from lower-level staff. The Ambassador
himself rarely flagged this as requiring high level attention. When he occasionally did so during

29

the spring and summer of 1978, it was not to warn that the Shah was in danger, but rather towarn that his government might use brute force to crush opposition. It elicited little or no
response. If anything, political reporting out of Tehran during the crucial period when thesituation was deteriorating was less likely to elicit a reaction from Washington than previously.
The State Department was also less, rather than more, responsive to Tehran than to otherembassies during the same period. This may be why, as Jervis writes, U.S. policymakers learned
too late that revolution was coming: “there were not full discussions during the spring andsummer when the United States had more options.” 63
It was only in September that Sullivan began to push for more attention. And it was not
until the next month that Washington became more responsive. Instead of acknowledging its
previous inattention, the White House instructed the Tehran embassy to “strengthen reporting”
and dispatched additional staff to “help fill in gaps” (U.S. Department of State 1978).
Cable language. The language used in reporting obviously matters too, since analysts canhedge and qualify their assessments. Scholars have therefore tried to isolate particular words that
portended unmistakable change. For instance, Guerrero makes a point of noting when the word
“revolution” was first used to describe the situation in Iran, which he says was when Ambassador
Sullivan responded to the demonstrations in Qom and Tabriz in February 1978. 64 Similarly,
Jervis is struck by the rarity with which analysts used the word “hate,” which illustrated theirfailure to capture the intensity of negative feeling among Iranians toward the Shah. 65
With computational methods we can analyze all the language of all the declassified State
Department cables going to and from Iran, starting with word counts of the terms
REVOLUTION, POLITICAL UNREST, POLITICAL CHANGE, DEMONSTRATION,
and COUP. We show the data in Figure 5. The patterns clearly indicate that while the embassy in30

Iran gradually increased their use of this kind of language in 1978, Washington officials rarely
used these words aside from the moment when the Shah was actually driven into exile.

Fig.5: Weekly count of cables using revolutionary language from and to IranGary Sick recalls that it would have been “bad form,” even career threatening, to betray alack of confidence in the Shah by using such words, in light of his central importance to31American foreign policy. 66 An alternative approach, one that does not depend on the use ofparticular words, is to use a sentiment analysis tool to compare cables, both over time andbetween the embassy and the State Department. Sentiment analysis tracks the use of manydifferent words—both positive and negative—to determine the overall tone. 67 While individual
field-specific words might have a different meaning than that conveyed in every-day usage, weare here using this tool simply to identify language trends in cables from and to Iran.
Figure 6 shows the results. Before the protests started in October 1977, officials in DC
and Iran used mostly positive language. The tone of the cables from Iran began to change after
the protests started, turning very negative after September 1978. In contrast, the messages fromDC to Iran remained largely positive in tone throughout the period. The State Department was
not necessarily more optimistic about the situation than were local officials, but their language
was more consistently positive, whereas embassy reporting became much more negative. This
too is consistent with the hypothesis that officials in Washington were not responding to theworsening news out of Tehran.

32

Figure 6. Sentiment analysis of political cables from and to Iran.
The texts of a cable sent from D.C. to the West German Foreign Minister Genscher and the
response from Tehran illustrates the difference in tone. D.C. officials stressed in the cable thatthe worst appeared to be over:
THE SHAH REALIZES, HOWEVER, THAT ALTHOUGH HE HAS SOMEBREATHING ROOM, HE STILL FACES GRAVE PROBLEMS IN RESTORINGSTABILITY TO IRAN. WE CONTINUE TO BELIEVE THAT, WITH THE
POLITICAL SHREWDNESS HE HAS SHOWN IN THE PAST, HE RETAINS THE

33

CAPABILITY TO LEAD THE COUNTRY TO ELECTIONS. WE BELIEVE IT IS
ESSENTIAL THAT HE REMAIN IN CONTROL. 68
The response from Tehran was much more negative in tone:
THE MESSAGE WHICH WAS SENT IN YOUR NAME TO FOREIGN MINISTERGENSCHER REPRESENTS A FAR MORE SANGUINE VIEW OF THE SHAH'SABILITY TO CONTROL FUTURE EVENTS IN IRAN THAN I COULD
CURRENTLY ENDORSE. I REALIZE THE NEED TO BUCK UP PANICKY WESTEUROPEANS BY STOUT DECLARATIONS. HOWEVER, I TRUST THAT CABLE
DOES NOT REPRESENT THE DEPT'S INTERPRETATION OF THIS EMBASSY'SREPORTING. IF SO, THERE SEEMS TO BE A COMMUNICATION GAP. 69
The next day Sullivan sent the famous “Thinking the Unthinkable” cable.
We can similarly perform KS-tests to see if there is a significant difference in thesentiment in the different periods we have analyzed. In the period before the protests started,
there is not a difference in the sentiment of cables from Iran and cables to Iran. In the second andthird periods, there is a significant difference, and cables from Iran were much more negative
than those to Iran.
The evidence then suggests that Embassy officials gradually began to give greater
emphasis to the severity of the situation. We begin to see a change in the language used before
September 1978, but the major change occurred after Sullivan returns from home leave. This isconsistent with the argument that intelligence providers did not want to seem overly pessimistic
in case the Shah was able to stay in power. By the time the substance of their reporting focusedon the threat of regime change and the reports went to high-level officials in Washington, it
might have been too late to do anything to stop it.
Religious nature of protests. Even if American diplomats responded to the protests byincreasing the volume of political reporting, and using language reflective of revolutionarychange and increasingly negative sentiment, they might still have failed to appreciate what madethe protests truly revolutionary. While the post-hoc analyses are not conclusive, they make a34

plausible case for why analysts and consumers would miss or misunderstand the role religion
would play in the overthrow of the Shah. Religion had played a role in early 1960s protests, but
the Shah had been able to easily weather these events. Even when Khomeini emerged as acentral figure, and called for the violent overthrow of the Shah, he was still in exile, andtherefore did not seem to pose an immediate threat. Moreover, much of the anti-American
rhetoric in Iran came from leftist and, especially, communist movements, which would be acentral concern for Washington in a country bordering the USSR during the Cold War. Finally,
Sullivan writes that, in 1977-78, the religious community had little interest in making contact
with the embassy, even when embassy officials made a determined effort. 70
It is not difficult to find evidence that analysts in Iran early on came to understand theimportance of religious fervor and religious leaders, and sought to learn more. In January 1978,
for instance, a retrospective analysis of the protests that started in Qom concluded that its
significance was to “ELEVATE RELIGIOUS OPPOSITION TO MORE VISIBLE,SIGNIFICANT POSITION AMONG THOSE WHO HAVE THUS FAR TAKENADVANTAGE OF NEW LIBERALIZATION.” Moreover, the embassy would “BEATTEMPTING TO WORK AT INHERENTLY DIFFICULT TASK OF LEARNING MOREABOUT RELIGIOUS ELEMENTS OF OPPOSITIONIST MOVEMENT, INCLUDINGDOCTRINES WHICH ARE CURRENTLY BEING ESPOUSED BY BOTH PROGRESSIVESAND REACTIONARIES.” 71
Did analysts actually succeed in identifying the man who would emerge as the supremeleader? For that we can calculate the frequency with which they began to refer to Khomeini. Thisis a tough test, since it is difficult to gauge the relative importance of rival political leaders when
events were still unfolding. But it is clear that there was relatively little interest in Khomeini in35

the reporting from Iran (Fig. 7). The coverage was sporadic and mostly disconnected from thepolitical demonstrations. Only in August 1978 do we begin to see a dramatic increase, as theembassy reported on his influence in the unrest in Iran. There was another spike in November
1978 when policymakers seriously considered the possibility that the Shah would be removed
from office.
But State Department cables were even slower to pick up on Khomeini’s significance,
lagging well behind reports from Iran. 72 There were virtually no mentions of Khomeini in cablesfrom Washington or from any other U.S. embassy, department, or agency until October 1978,
when he was expelled from Iraq by then-Vice President Saddam Hussein, and moved to
Neauphle-le-Château, a suburb of Paris. Even then it was sporadic, and there is no dramaticincrease until the Shah went into exile in January. In the same four-month period, Khomeini
drew extensive coverage by world media.

36Figure 7: Khomeini mentions in political cables from and to Iran.
The CIA was even slower to recognize Khomeini’s importance. As shown in Figure 8, it
was not until November 1978 that Khomeini started to show up in the National Intelligence
Dailies, and the biggest spike does not occur until the next year. For the CIA, then, Khomeini
appeared almost out of nowhere.

37

Figure 8: Khomeini mentions in National Intelligence Dailies
But even the State Department long remained focused on the Shah, as indicated by how
the ratio of mentions did not shift to Khomeini until after the Shah went into exile. In reading thecables, it is striking how persistently senior U.S. officials continued to look to the Shah as animportant ally. The Shah had been in office for more than 25 years by this point, and had cometo seem irreplaceable (Fig. 9).

38

Fig. 9: Ratio of Khomeini mentions to Shah mentions across State Department political cables

Conclusion
We have focused on three ways that intelligence failures can occur. First, analysts canmiss signals and fail to report important events and trends. Second, policymakers might fail toreact to such reports. Third, an intelligence failure could also occur if the reports do not reflect
the severity of new political risks, so severe as to require a fundamental change in policy.

39

In the Iranian case, we find significant and measurable differences in State Department
reporting, which closely tracked the worsening situation in the frequency of communications.
The more limited information available from the CIA indicates that Agency analysts lagged
behind. The foreign service officers in Iran could have been more insistent on the revolutionary
nature of the situation -- especially its religious nature – and pressed for a response from senior
officials. But even if they had, and even if they were joined by intelligence analysts, the mostsenior policymakers were paying less attention to Iran during the crucial period, and were clearlyslow to react even when they did begin receiving high-level warnings.
To be sure, it is not clear whether the U.S. could have dramatically altered the course of
events. U.S. policymakers were unaware of key aspects of the situation, such as how the Shah
was seriously ill, which he kept secret from everyone but his doctors. His concern that a moreforceful response to protests would jeopardize a future succession shaped his response in ways
few understood at the time. Ayatollah Khomeini himself may have been surprised at how thesituation unfolded. But a more timely and accurate assessment of the seriousness of the crisis,
and the range of possible outcomes, would have allowed policymakers to spend more time
preparing, and less time blaming one another.
To understand intelligence failures, a close reading of the historical record on important
cases like the Iranian revolution is clearly necessary, but it may not be sufficient. Intelligencereports are often written in such a way as to hedge bets and avoid blame, and cherry-picked
quotations can be used to argue nearly opposite interpretations of the same record. Moreover,fine-grained analyses of a few well-known failures do not allow us to understand intelligencereporting on possible regime change more generally, since we need to identify and analyze
different kinds of cases that had different kinds of outcomes. We also need to understand how

40reporting on potential regime change figures in the larger flow of information going topolicymakers, including intelligence that comes from outside the intelligence community.
The approaches demonstrated in this paper were developed to scale to larger analyses thatsatisfy these criteria. Follow-up work could encompass the numerous coups and revolutions inSouth America, Europe, Africa, and Asia in the 1970s, as well as the even larger number of cases
in which governments did not topple because coups failed or revolutionary unrest fizzled. Suchstudies would examine the traffic flow and content of communications to identify instances inwhich reporting reflected or failed to reflect instability, and where policymakers were more orless attentive to these fluctuations.
Some of these methods could also work in real time, and reveal when there is a
disconnect in communications to and from embassies, whether in the frequency of reporting on
political instability, or the language of these messages. To be sure, this approach may only be
helpful in certain situations. But if analysts cannot reliably predict coups and revolutions, it
might nevertheless be possible to make intelligence failures more predictable.

41

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47

Appendix
Table A1: Results from ARIMA(0,1,1) Regressions (text length)=====================================================================
Dependent variable: Number of words-------------------------------------------------All Incoming Political
Revolution
Khomeini/Tudeh
3706 cables
1516 cables
403 cables
114 cables------------------------------------------------------------------------MA(1)−0.646∗∗∗−0.677∗∗∗−0.547∗∗∗−0.557∗∗∗(0.084)(0.084)(0.116)(0.116)
Demonstrations 60.788∗∗
43.584∗∗17.6764.352(26.491)(21.579)(13.135)(10.633)------------------------------------------------------------------------Observations
55
55
55
55
Log-likelihood-532.637-521.461-494.114-480.155
𝜎𝜎²(in millions)14.961
9.951
3.698
2.226
Akaike Inf. Crit. 1,071.275 1,048.923
994.228966.310=====================================================================
Note:*p<0.1; **p<0.05; ***p<0.01

Another way we can examine this hypothesis is by measuring the responsiveness ofpolitical reporting in terms of total words instead of the number of cables. As the number ofprotests increased, analysts often attempted to summarize the situation from cities across thecountry. A series of seven protests in different cities on one day, in other words, might all havebeen mentioned in one cable that describes the happenings in each location rather than sevendifferent cables. Demonstrations have a positive and significant effect on the first 2 dependent
variables, but not on cables containing language related to unrest or on State Department reports
mentioning Khomeini or the Tudeh. Again we see the strongest effect of demonstrations on PTAG reports. Because the dependent variable is logged to see the effect of demonstrations, weneed to exponentiate its coefficient, which will then tell us the percentage change in words whendemonstrations increase. Looking at all cables from Iran, each additional demonstration48

increases its length by an average of 61 words. An additional demonstration would increase thelength of a P-TAG report by 44 words.

49

Fig. A1: Political Cables from Iran and Demonstrations

50

Fig. A2: Tudeh and Khomeini mentions in political cables from Iran. It is only after the second
breakpoint that the embassy begins to pay more attention to Khomeini than to the communists,reflecting the slowness with which Americans in Iran shifted focus to what turned out to be themain threat to the regime.

51

Columbia University; Columbia University; Columbia University; New York University
Quoted in Bill, Eagle and Lion, 259.
3
Jervis, Why Intelligence Fails, 26.
4
Wohlstetter, Pearl Harbor; Knorr, Failures in National Intelligence Estimates; Betts, Analysis, War, and Decision.
5
Garciano and Posner, Intelligence Failures; Zegart, Flawed by Design; Zegart, Spying Blind.
6
Jervis, Perception and Misperception; Jervis, Why Intelligence Fails; Bar-Joseph, Intelligence Failure and Need
for Cognitive Closure.
7
Gentry, “Intelligence Failure Reframed”; Hedley, “Learning from Intelligence Failures”; Wirtz, “Art ofIntelligence Autopsy”.
8
Kent, Strategic Intelligence for American World Policy, 9-10.
9Jervis, Perception and Misperception; Jervis, Why Intelligence Fails; Heuer, Psychology of Intelligence Analysis.
10
Wohlstetter, Pearl Harbor.
11
On the tendency of observers to fixate on failures, and not assess how frequently they occur relative tointelligence successes, see Betts, Analysis, War, and Decision, 62. Also see Marrin, “Preventing Intelligence
Failure” for ways to improve intelligence reporting, including an examination of analytic successes.
12
Indeed, as Jensen, “Intelligence Failures” argues, there is a tension between what providers can reasonably
provide and what consumers expect. That is, providers of information cannot be expected to be omniscient.
13
Wirtz, “Déjà vu?”; Zegart, Flawed by Design; Zegart, Flying Blind. Zegart, “September 11”.
14
Knorr, Failures in National Intelligence Estimates; Jervis, Why Intelligence Fails.
15
Hatlebrekke & Smith, Towards New Theory of Intelligence Failure.
16
Tetlock, Expert Political Judgment.
17
Eiran, “Three Tensions”.
18
Jervis, Why Intelligence Fails, 2.
19
Cited in Guerrero, Carter Administration, 93.
20
Bill, Eagle and Lion, 258.
21
Safire, Adm. Turner’s Failures.
22
Sullivan, Mission to Iran, 203-204.
23
Sullivan, Mission to Iran.
24
Sick, All Fall Down, 35.
25
Ibid., 66.
26
Nolan and MacEachin, “Discourse, Dissent, and Strategic Surprise” and Treverton “Fall of the Shah” argue thatthe executive strongly discouraged contact with opposition groups, going so far as to punishing individuals whowent against the wishes. While Carter and his officials bear the brunt of the blame for the information failure, theevidence that individuals were punished is thin. A bigger issue seems to be that officials relied on opposition groups
with whom they were comfortable—middle-class liberals.
27
Brzezinski, Power and Principle, 359-360.
28
Ibid.
29
Vance, Hard Choices, 325-326.
30
Kitchens, Crisis and Intelligence. Also see Nolan and MacEachin, “Discourse, Dissent, and Strategic Surprise.”31
Jervis, Why Intelligence Fails, 22.
32
Ibid., 41.
33
Bill, Eagle and Lion, 243.
34
Guerrero, Carter Administration.
35
Daughtery, “Behind the Intelligence Failure.”
36
Donovan, “National Intelligence and the Iranian Revolution.”
37
Bar-Joseph, “Forecasting a Hurricane.”38
Sick, All Fall Down, 35.
39c.f. 1978TEHRAN00389, SERIOUS RELIGIOUS DISSIDENCE, which calls it the “most serious incident of thissort for years.” Subsequent reports describe how it touched off riots in several other cities, and revealed the strengthof the conservative religious opposition (1978TEHRAN00665, MORE REACTION TO QOM DEMONSTRATIONS;
1978TABRIZ00004, DEMONSTRATIONS IN TABRIZ; 1978TEHRAN00961, RELIGION AND POLITICS).
40
Sick, All Fall Down, 74, 77, 90.
1
2

52

We are not the first to use State Department documents to study intelligence failures. Karam, “Missing
Revolution” uses State Department cables to understand the failure of U.S. intelligence to anticipate the 1958 Iraqi
revolution.
42
We use “communications” when referring to all documents we analyze based on metadata which includes
documents delivered by diplomatic pouch and still-classified cables (which are missing text). “Cables” refers to thesubset of documents for which we have the full message text, i.e. declassified cables. They are called cables because
these time-sensitive communications were originally transmitted by telegraphic cables.
43
Jervis, Why Intelligence Fails.
44
Sick: communication with authors.
45
Grimmer and Stewart. “Text as Data,” 271
46
1978TEHRAN07242, MORE ON RECENT RIOTS; 1978TEHRAN07882, IRAN.
47
Using Bai and Perron, Critical Values.
48
Rasler, Concessions, Repression, and Political Protest. Rasler no longer had the original demonstration data so
we reconstructed the number of demonstrations from the graph in her 1996 article. The date range she mentions in
the text should have 63 weeks but there are only 57 points on the graph. We assume the end point of Wednesday
February 14, 1979 is correct and start the data as of Thursday January 12th, 1978.
49
TAGs were assigned to each communications by the people who wrote the cable. Political TAGs include all
subject TAGS that began with the letter “P”.
50
Incoming cables include any of the following words or phrases {"REVOLUTION", "POLITICAL UNREST","DEMONSTRATION", "POLITICAL CHANGE", "COUP"}.
51
Incoming cables include any of the following words {"KHOMEINI", "RUHOLLAH", "TUDEH","COMMUNIST", "COMMUNISM"}.
52
Because we are dealing with time-series data, we must ensure that all of our series are stationary before making
inferences from regressions. That is, we require the mean and variance of the series to be constant over time. Using
Augmented Dickey Fuller and Phillips-Perron tests we find that, for all four State Department series, this is not thecase. As is standard, we make the series stationary by differencing it, and then apply an ARIMA model to determine
whether cables from Iran varied based on the number of demonstrations. The I in ARIMA deals with non-stationary
series while the AR part accounts for auto-correlation. Once we difference the data, the autocorrelation for all four
series becomes negative and significant, which suggests that we should not account for an AR term in the model.
Instead, we include a 1 period moving average to the model. Our basic ARIMA model is then of order (0,1,1).
We also use the auto.arima() function from the R forecast library which suggests the same set of models. The
exception is that auto.arima() suggests a model of order(1,1,2) for the Khomeini and Tudeh mentions. The
demonstrations variable is insignificant in either model so for ease of presentation we report the order(0,1,1) results.
53
In Appendix Table A1 we show the same analysis using the total number of words in the cables rather than thenumber of communications. Demonstrations continue to have a significant effect on all reporting and on Politicalcommunications.
54
We see a similar pattern when using t-tests. The one difference is that the ratio between Iran and non-Irancommunications during the first period is not significant with a t-test.
55
Specifically, we look at the Alexandria, Cairo, Jerusalem, and Tel Aviv embassies.
56
The t-test results show a similar pattern as the KS-test results. The first and third periods have significant
differences, but there is no difference in the second period.
57
1978TEHRAN03892, GOI DISCOURAGEMENT OF DISSIDENT POLITICAL ACTION; 1978STATE110017,
GOI DISCOURAGEMENT OF DISSIDENT POLITICAL ACTION.
58
1978TEHRAN04582, GOI DISCOURAGEMENT OF DISSIDENT POLITICAL ACTION; 1978TEHRAN05390,
DISCUSSION WITH SHAH.
59
1978TEHRAN08217, RECOMMENDATION FOR PRESIDENT.
60
Seliktar, Failing Crystal Ball Test.
61
1978TEHRAN09431, IRANIAN PERMRE TO UNITED NATIONS URGES.
62
1978STATE231682, SAVAK.
63
Jervis, Why Intelligence Fails, 19-20.
64
Guerrero, Carter Administration, 74.
65
Jervis, Why Intelligence Fails, 39.
66
Sick communication with authors.
67
For this purpose, we used a standard dictionary courtesy of software provided by Benoit, et. al., quanteda.
68
1978STATE283811, MESSAGE TO FOREIGN MINISTER.
69
1978TEHRAN10962, MESSAGE TO FOREIGN MINISTER GENSCHER.
41

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Sullivan, Mission to Iran.
1978TEHRAN00961, RELIGION AND POLITICS.
72 The figure focuses on communications to and from Iranian embassies and consulates. We also looked
at Khomeini mentions to and from all U.S. embassies and consulates. Until the beginning of 1979, almost
all communications mentioning Khomeini are from or to an Iranian location. At this point, most of thementions come from outside Iran culminating in a very large number of Khomeini mentions from outside
Iran during the Hostage Crisis.
70
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