# Polity data series

The Polity data series is a data series in political science research. Along with the V-Dem Democracy indices project and Democracy Index (The Economist), Polity is among prominent datasets that measure democracy and autocracy.
The Polity study was initiated in the late 1960s by Ted Robert Gurr and is now continued by Monty G. Marshall, one of Gurr's students. It was sponsored by the Political Instability Task Force (PITF) until February 2020. The PITF is funded by the Central Intelligence Agency.
The data series has been criticized for its methodology, Americentrism, and connections to the CIA. Seva Gunitsky, an assistant professor at the University of Toronto, stated that the data series was appropriate "for research that examines constraints on governing elites, but not for studying the expansion of suffrage over the nineteenth century".

## Scoring chart

Polity Score ranges from -10 to +10 :
| Polity score range | 10 | 6 to 9 | 1 to 5 | -5 to 0 | -10 to -6 |
| Regime type | Full Democracy | Democracy | Open Anocracy | Closed Anocracy | Autocracy |

## Scores for 2018

| Country | Democracy score | Autocracy score | Polity IV score | Polity IV regime type |
| Afghanistan | 1 | 2 | -1 | Closed Anocracy |
| Albania | 9 | 0 | 9 | Democracy |
| Algeria | 3 | 1 | 2 | Open Anocracy |
| Angola | 2 | 4 | -2 | Closed Anocracy |
| Argentina | 9 | 0 | 9 | Democracy |
| Armenia | 7 | 0 | 7 | Democracy |
| Australia | 10 | 0 | 10 | Full Democracy |
| Austria | 10 | 0 | 10 | Full Democracy |
| Azerbaijan | 0 | 7 | -7 | Autocracy |
| Bahrain | 0 | 10 | -10 | Autocracy |
| Bangladesh | 0 | 6 | -6 | Autocracy |
| Belarus | 0 | 7 | -7 | Autocracy |
| Belgium | 8 | 0 | 8 | Democracy |
| Benin | 7 | 0 | 7 | Democracy |
| Bhutan | 7 | 0 | 7 | Democracy |
| Bolivia | 7 | 0 | 7 | Democracy |
| Botswana | 8 | 0 | 8 | Democracy |
| Brazil | 8 | 0 | 8 | Democracy |
| Bulgaria | 9 | 0 | 9 | Democracy |
| Burkina Faso | 7 | 1 | 6 | Democracy |
| Burundi | 2 | 3 | -1 | Closed Anocracy |
| Cambodia | 0 | 4 | -4 | Closed Anocracy |
| Cameroon | 1 | 5 | -4 | Closed Anocracy |
| Canada | 10 | 0 | 10 | Full Democracy |
| Cape Verde | 10 | 0 | 10 | Full Democracy |
| Central African Republic | 7 | 1 | 6 | Democracy |
| Chad | 1 | 3 | -2 | Closed Anocracy |
| Chile | 10 | 0 | 10 | Full Democracy |
| China | 0 | 7 | -7 | Autocracy |
| Colombia | 7 | 0 | 7 | Democracy |
| Comoros | 0 | 3 | -3 | Closed Anocracy |
| Congo Brazzaville | 0 | 4 | -4 | Closed Anocracy |
| Congo Kinshasa | 1 | 4 | -3 | Closed Anocracy |
| Costa Rica | 10 | 0 | 10 | Full Democracy |
| Croatia | 9 | 0 | 9 | Democracy |
| Cuba | 1 | 6 | -5 | Closed Anocracy |
| Cyprus | 10 | 0 | 10 | Full Democracy |
| Czech Republic | 9 | 0 | 9 | Democracy |
| Denmark | 10 | 0 | 10 | Full Democracy |
| Djibouti | 3 | 0 | 3 | Open Anocracy |
| Dominican Republic | 8 | 1 | 7 | Democracy |
| East Timor | 9 | 1 | 8 | Democracy |
| Ecuador | 6 | 1 | 5 | Open Anocracy |
| Egypt | 0 | 4 | -4 | Closed Anocracy |
| El Salvador | 8 | 0 | 8 | Democracy |
| Equatorial Guinea | 0 | 6 | -6 | Autocracy |
| Eritrea | 0 | 7 | -7 | Autocracy |
| Estonia | 9 | 0 | 9 | Democracy |
| Ethiopia | 3 | 2 | 1 | Open Anocracy |
| Fiji | 4 | 0 | 4 | Open Anocracy |
| Finland | 10 | 0 | 10 | Full Democracy |
| France | 9 | 0 | 9 | Democracy |
| Gabon | 4 | 1 | 3 | Open Anocracy |
| Gambia | 4 | 0 | 4 | Open Anocracy |
| Georgia | 8 | 1 | 7 | Democracy |
| Germany | 10 | 0 | 10 | Full Democracy |
| Ghana | 8 | 0 | 8 | Democracy |
| Greece | 10 | 0 | 10 | Full Democracy |
| Guatemala | 9 | 1 | 8 | Democracy |
| Guinea | 4 | 0 | 4 | Open Anocracy |
| Guinea-Bissau | 7 | 1 | 6 | Democracy |
| Guyana | 8 | 1 | 7 | Democracy |
| Haiti | 6 | 1 | 5 | Open Anocracy |
| Honduras | 7 | 0 | 7 | Democracy |
| Hungary | 10 | 0 | 10 | Full Democracy |
| India | 9 | 0 | 9 | Democracy |
| Indonesia | 9 | 0 | 9 | Democracy |
| Iran | 0 | 7 | -7 | Autocracy |
| Iraq | 6 | 0 | 6 | Democracy |
| Ireland | 10 | 0 | 10 | Full Democracy |
| Israel | 7 | 1 | 6 | Democracy |
| Italy | 10 | 0 | 10 | Full Democracy |
| Ivory Coast | 5 | 1 | 4 | Open Anocracy |
| Jamaica | 9 | 0 | 9 | Democracy |
| Japan | 10 | 0 | 10 | Full Democracy |
| Jordan | 2 | 5 | -3 | Closed Anocracy |
| Kazakhstan | 0 | 6 | -6 | Autocracy |
| Kenya | 9 | 0 | 9 | Democracy |
| Kosovo | 8 | 0 | 8 | Democracy |
| Kuwait | 0 | 7 | -7 | Autocracy |
| Kyrgyzstan | 8 | 0 | 8 | Democracy |
| Laos | 0 | 7 | -7 | Autocracy |
| Latvia | 8 | 0 | 8 | Democracy |
| Lebanon | 6 | 0 | 6 | Democracy |
| Lesotho | 9 | 1 | 8 | Democracy |
| Liberia | 8 | 1 | 7 | Democracy |
| Lithuania | 10 | 0 | 10 | Full Democracy |
| Luxembourg | 10 | 0 | 10 | Full Democracy |
| Republic of Macedonia | 9 | 0 | 9 | Democracy |
| Madagascar | 6 | 0 | 6 | Democracy |
| Malawi | 6 | 0 | 6 | Democracy |
| Malaysia | 7 | 0 | 7 | Democracy |
| Mali | 6 | 1 | 5 | Open Anocracy |
| Mauritania | 0 | 2 | -2 | Closed Anocracy |
| Mauritius | 10 | 0 | 10 | Full Democracy |
| Mexico | 8 | 0 | 8 | Democracy |
| Moldova | 9 | 0 | 9 | Democracy |
| Mongolia | 10 | 0 | 10 | Full Democracy |
| Montenegro | 9 | 0 | 9 | Democracy |
| Morocco | 1 | 5 | -4 | Closed Anocracy |
| Mozambique | 6 | 1 | 5 | Open Anocracy |
| Myanmar | 8 | 0 | 8 | Democracy |
| Namibia | 6 | 0 | 6 | Democracy |
| Nepal | 8 | 1 | 7 | Democracy |
| Netherlands | 10 | 0 | 10 | Full Democracy |
| New Zealand | 10 | 0 | 10 | Full Democracy |
| Nicaragua | 7 | 1 | 6 | Democracy |
| Niger | 6 | 1 | 5 | Open Anocracy |
| Nigeria | 8 | 1 | 7 | Democracy |
| North Korea | 0 | 10 | -10 | Autocracy |
| Norway | 10 | 0 | 10 | Full Democracy |
| Oman | 0 | 8 | -8 | Autocracy |
| Pakistan | 7 | 0 | 7 | Democracy |
| Panama | 9 | 0 | 9 | Democracy |
| Papua New Guinea | 5 | 0 | 5 | Open Anocracy |
| Paraguay | 9 | 0 | 9 | Democracy |
| Peru | 9 | 0 | 9 | Democracy |
| Philippines | 8 | 0 | 8 | Democracy |
| Poland | 10 | 0 | 10 | Full Democracy |
| Portugal | 10 | 0 | 10 | Full Democracy |
| Qatar | 0 | 10 | -10 | Autocracy |
| Romania | 9 | 0 | 9 | Democracy |
| Russia | 5 | 1 | 4 | Open Anocracy |
| Rwanda | 0 | 3 | -3 | Closed Anocracy |
| Saudi Arabia | 0 | 10 | -10 | Autocracy |
| Senegal | 7 | 0 | 7 | Democracy |
| Serbia | 9 | 1 | 8 | Democracy |
| Sierra Leone | 8 | 1 | 7 | Democracy |
| Singapore | 2 | 4 | -2 | Closed Anocracy |
| Slovak Republic | 10 | 0 | 10 | Full Democracy |
| Slovenia | 10 | 0 | 10 | Full Democracy |
| Solomon Islands | 9 | 1 | 8 | Democracy |
| Somalia | 5 | 0 | 5 | Open Anocracy |
| South Africa | 9 | 0 | 9 | Democracy |
| South Korea | 8 | 0 | 8 | Democracy |
| Spain | 10 | 0 | 10 | Full Democracy |
| Sri Lanka | 7 | 1 | 6 | Democracy |
| Sudan | 0 | 4 | -4 | Closed Anocracy |
| Suriname | 6 | 1 | 5 | Open Anocracy |
| Swaziland | 0 | 9 | -9 | Autocracy |
| Sweden | 10 | 0 | 10 | Full Democracy |
| Switzerland | 10 | 0 | 10 | Full Democracy |
| Syria | 0 | 9 | -9 | Autocracy |
| Taiwan | 10 | 0 | 10 | Full Democracy |
| Tajikistan | 1 | 4 | -3 | Closed Anocracy |
| Tanzania | 4 | 1 | 3 | Open Anocracy |
| Thailand | 0 | 3 | -3 | Closed Anocracy |
| Togo | 1 | 3 | -2 | Closed Anocracy |
| Trinidad and Tobago | 10 | 0 | 10 | Full Democracy |
| Tunisia | 7 | 0 | 7 | Democracy |
| Turkey | 0 | 4 | -4 | Closed Anocracy |
| Turkmenistan | 0 | 8 | -8 | Autocracy |
| Uganda | 1 | 2 | -1 | Closed Anocracy |
| Ukraine | 5 | 1 | 4 | Open Anocracy |
| United Arab Emirates | 0 | 8 | -8 | Autocracy |
| United Kingdom | 8 | 0 | 8 | Democracy |
| United States | 8 | 0 | 8 | Democracy |
| Uruguay | 10 | 0 | 10 | Full Democracy |
| Uzbekistan | 0 | 9 | -9 | Autocracy |
| Venezuela | 1 | 4 | -3 | Closed Anocracy |
| Vietnam | 0 | 7 | -7 | Autocracy |
| Zambia | 6 | 0 | 6 | Democracy |
| Zimbabwe | 5 | 1 | 4 | Open Anocracy |

## Criticism

The 2002 paper "Conceptualizing and Measuring Democracy" claimed several problems with commonly used democracy rankings, including Polity, opining that the criteria used to determine "democracy" were misleadingly narrow.
The Polity data series has been criticized by Fairness & Accuracy in Reporting for its methodology and determination of what is and isn't a democracy. FAIR has criticized the data series for Americentrism with the United States being shown as the only democracy in the world in 1842, being given a nine out of ten during slavery, and a ten out of ten during the Jim Crow era. The organization has also been critical of the data series for ignoring European colonialism in Africa and Asia with those areas being labeled as no data before the 1960s. FAIR has also been critical of the data series' connection to the Central Intelligence Agency. Max Roser, the founder of Our World in Data, stated that Polity IV was far from perfect and was concerned at the data series' connections with the Central Intelligence Agency.
Seva Gunitsky, an assistant professor at the University of Toronto, wrote in The Washington Post where he stated that "Polity IV measures might be appropriate for research that examines constraints on governing elites, but not for studying the expansion of suffrage over the nineteenth century". Gunitsky was critical of the data series for ignoring suffrage.