People like Jean Claude Juncker, Prodi, Lech Walesa, Bernard Cazeneuve, Stephen Harper, Cesar Gaviria, Mariono Rajoy, ...
It's a long list.
Iran stays the same because our right-wing politicians and the military complex prefer it that way. They speak to the Mullahs, - that's like asking a serial killer not to be unkind.
The Mullahs are religious fanatics ... people like those mentioned above spoke to the PEOPLE of Iran, they tried to show them that if they exercised their political will and Rights ... they would be supported.
Obama had no help because it would remove a vast opportunity to arm the West if the religious regime was toppled.
Think about the East German wall coming down. What Ronald Reagan and Thatcher did in East Germany. We don't have politicians that capable anymore.
Or perhaps we learned what the cost of that exercise was to the military - a lot of people lost their jobs. There was no enemy anymore. Nasa became far less attractive ...etc.