It might seem like a hard take but, what happened in 1979 is not much different that 1953 with regard to influence of western countries on it IMO. Many people in Iran also believe the 1979 "revolution" was supported by western countries, if not planned. Iran was on a path to rapid growth and also Shah's decision on doubling the Oil's price in 1973 could be another reason [1].

http://www.pbs.org/wgbh/pages/frontline/tehranbureau/2012/06...