Twenty-two years after Ayatollah Khomeini's ascent to power in Iran many aspects of his 1979 Islamic revolution remain obscure if not baffling. For instance, in November 1978 an offer was made to him in his Paris exile to return to Iran with international guarantees of freedom of speech and action. He refused and demanded the departure of the Shah. Americans put pressure on the monarch to leave the country. Khomeini arrived in Tehran in early February...