Dirty Harry, no doubt.
The film marks the transition from the jolly good sixties to the wayward seventies; it's a perfect right-wing statement, a hard-hitting, no-nonsense wake up call for all those still smoking pot or just dozing off while criminals threatened to take over the streets. It made people clear love wasn't all you need: for some problems, you simply need a gun
What makes the film so special is that it refused to follow any trend (instead it created one)
It's not A sign of the times, it was THE sign of the times
it just was there ... and cinema looked different (once again)
Remarkable that Clint was involved in the most trendsetting movie of the sixties AND the most trendsetting movie of the seventies (Just lucky, punk?)
The French Connection is a good film, but it always left me a bit cold, typical product of its times