The United States and Iran initially made an alliance after Iran re-accessed its relationship with the Soviet Union. The U.S. supplied Iran with military and economic help against the communists, which angered the Shah.
﻿The Shah's White Revolution ﻿modernized Iran and brought Western ideals to the country. The American lifestyle had an influence in the revolution, partly because of their alliance. Some changes included social reforms and the redistribution of land. The revolution led to the eventual Islamic Revolution of 1979.
The Islamic Revolution of 1979 rejected Western ideals that were introduced during the White Revolution and condemned the Shah's revolution. The leader of the revolution, Khomeini, was critical of the Shah for his relations with the U.S. and Britain. It caused Iran to transform into an Islamic state.