Abbas Milani provides an "intellectual history of the green wave":
Before coming to power, Khomeini argued that the most important duty,
indeed the raison d'etre of an Islamic government, was to implement
fully the tenets of sharia. But once in power and faced with
the complexities of modern Iranian society, he subtly changed the very
foundation of his theory. He introduced the concept of maslaha--interests
of the regime--and declared, much to the consternation of nearly every
other ayatollah, that these interests, as determined by him or his
successor, would supersede even the fundamentals of Islam. In other
words, the state was everything--and sharia was nothing but its
legitimizing narrative, a narrative that could be suspended at the will
of the leader.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2009/07/allah-as-puppet-president/198992/
