This is a good point. The US effectively forced the decolonization process on Britain, opening half the world to our corporations.
And all manner of kooky anti-American roups and generic trouble makers, don't forget that.
I also think that we should've supported Britain and France during Suez rather than pulling the plug on them.
Why? It kept Egypt relatively neutral and made the US look good in the newly decolonised countries. If the US had done nothing the Soviets would have, so US action put a stop to that too. In fact it may have given the Soviets the impression that the US was willing to work with them, at a time Khrushchev was seeking some form of rapproachment. Egyptian ownership of the Canal wasn't that big an issue in the long run, and it spent more time closed later on thanks to a US supported war.
With Iran I doubt we could've simply taken the assets without causing too much strain in Britain
So much for your earlier argument:
Mossadegh nationalized the assets of British Petroleum, a leading corporation and overseas investor from America's most important ally.
So at first you think the motivation was to save a British asset, now you seem to claim that the objective was for the US to seize a British asset? You do however make an inadvertantly good point. If memory served the revised oil agreement with the Shah paved the way for a bigger US stake in Iranian oil. This further discredits the premise of your first argument.
but doing nothing was an option, as is your proposal of the US acting as an honest broker.
Given your interest in economics and finance, I'm sure you are aware that a broker never gets anywhere by doing nothing.
I think the real problem was withdrawing CIA monitoring from Iran and then pushing the Shah to make democratic reforms.
Was CIA monitoring really necessary given the strength of SAVAK? The democratic reforms were also a tactical move due to rising opposition, rather than the cause for the success of the opposition. Opposition against the Shah had been building up for some time and had been getting more radical with each iterance. So for example lets say it started with Shariati, then Khomeini when he was still a domestic critic and then Khomeini as a critic abroad.
Having failed to either break the opposition by force or discredit them (the White Revolution didn't reach broadly enough, so grass roots discontent continued), it was only a matter of time before the opposition forces defeated the Shah.