Ruhollah Khomeini

Context: In January 1963, the Shah announced the "White Revolution", a six-point programme of reform calling for land reform, nationalization of the forests, the sale of state-owned enterprises to private interests, electoral changes to enfranchise women and allow non-Muslims to hold office, profit-sharing in industry, and a literacy campaign in the nation's schools. Some of these initiatives were regarded as dangerous, especially by the powerful and privileged Shi'a ulama (religious scholars), and as Westernizing trends by traditionalists (Khomeini viewed them as "an attack on Islam"). Ayatollah Khomeini summoned a meeting of the other senior marjas of Qom and persuaded them to decree a boycott of the referendum on the White Revolution. On 22 January 1963 Khomeini issued a strongly worded declaration denouncing the Shah and his plans. Two days later the Shah took an armored column to Qom, and delivered a speech harshly attacking the ulama as a class.  Khomeini continued his denunciation of the Shah's programmes, issuing a manifesto that bore the signatures of eight other senior Iranian Shia religious scholars. In it he listed the various ways in which the Shah had allegedly violated the constitution, condemned the spread of moral corruption in the country, and accused the Shah of submission to the United States and Israel. He also decreed that the Nowruz celebrations for the Iranian year 1342 (which fell on 21 March 1963) be canceled as a sign of protest against government policies.  On the afternoon of 'Ashura (3 June 1963), Khomeini delivered a speech at the Feyziyeh madrasah drawing parallels between the Sunni Muslim caliph Yazid, who is perceived as a 'tyrant' by Shias, and the Shah, denouncing the Shah as a "wretched, miserable man," and warning him that if he did not change his ways the day would come when the people would offer up thanks for his departure from the country.  On 5 June 1963 (15 of Khordad) at 3:00 am, two days after this public denunciation of the Shah Mohammad Reza Pahlavi, Khomeini was detained in Qom and transferred to Tehran. This sparked three days of major riots throughout Iran and led to the deaths of some 400. That event is now referred to as the Movement of 15 Khordad. Khomeini was kept under house arrest and released in August.  Khomeini was not allowed to return to Iran during the Shah's reign (as he had been in exile). On 17 January 1979, the Shah left the country (ostensibly "on vacation"), never to return. Two weeks later, on Thursday, 1 February 1979, Khomeini returned in triumph to Iran, welcomed by a joyous crowd estimated (by BBC) to be of up to five million people. On his chartered Air France flight back to Tehran 120 journalists accompanied him, including three women. One of the journalists, Peter Jennings, asked: "Ayatollah, would you be so kind as to tell us how you feel about being back in Iran?" Khomeini answered via his aide Sadegh Ghotbzadeh: "Hichi" (Nothing). This statement--much discussed at the time and since--was considered by some reflective of his mystical beliefs and non-attachment to ego. Others considered it a warning to Iranians who hoped he would be a "mainstream nationalist leader" that they were in for disappointment.  To others, it was a reflection of an unfeeling leader incapable or unconcerned with understanding the thoughts, beliefs, or the needs of the Iranian populace.  Khomeini adamantly opposed the provisional government of Shapour Bakhtiar, promising "I shall kick their teeth in. I appoint the government." On 11 February (Bahman 22), Khomeini appointed his own competing interim prime minister, Mehdi Bazargan, demanding, "since I have appointed him, he must be obeyed." It was "God's government," he warned, disobedience against him or Bazargan was considered a "revolt against God."  As Khomeini's movement gained momentum, soldiers began to defect to his side and Khomeini declared ill fortune on troops who did not surrender. On 11 February, as revolt spread and armories were taken over, the military declared neutrality and the Bakhtiar regime collapsed. On 30 and 31 March 1979, a referendum to replace the monarchy with an Islamic Republic passed with 98% voting in favour of the replacement, with the question: "should the monarchy be abolished in favour of an Islamic Government?"  Although revolutionaries were now in charge and Khomeini was their leader, some opposition groups claim that several secular and religious groups were unaware of Khomeini's plan for Islamic government by wilayat al-faqih, which involved rule by a marja' Islamic cleric. They claim that this provisional constitution for the Islamic Republic did not include the post of supreme Islamic clerical ruler. The Islamic government was clearly defined by Khomeini in his book Hokumat-e Islami: Velayat-e faqih (Islamic Government: Governance of the Jurist) which was published while Khomeini was in exile in 1970, smuggled into Iran, and distributed to Khomeini's supporters. This book included Khomeini's notion of wilayat al-faqih (Governance of the Jurist) as well as the reasoning and in his view, the necessity of it in running an Islamic state.  Khomeini and his supporters worked to suppress some former allies and rewrote the proposed constitution. Some newspapers were closed, and those protesting the closings were attacked. Opposition groups such as the National Democratic Front and Muslim People's Republican Party were attacked and finally banned. Through popular support, Khomeini supporters gained an overwhelming majority of the seats in the Assembly of Experts which revised the proposed constitution. The newly proposed constitution included an Islamic jurist Supreme Leader of the country, and a Council of Guardians to veto un-Islamic legislation and screen candidates for office, disqualifying those found un-Islamic.  In November 1979, the new constitution of the Islamic Republic was adopted by national referendum. Khomeini himself became instituted as the Supreme Leader (Guardian Jurist), and officially became known as the "Leader of the Revolution." On 4 February 1980, Abolhassan Banisadr was elected as the first president of Iran. Critics complain that Khomeini had gone back on his word to advise, rather than rule the country. CANNOTANSWER

Question: Why is the Islamic constitution important to Ruhollah Khomeini?
Answer: the Shah announced the "White Revolution", a six-point programme of reform