What are some revolutionary events of the 70's and 90's?

As in political and social events.


Also, events that are positive, like how the Berlin wall came down in the 1980's. Events that "furthered" humanity, not to sound too cliche.

What are some revolutionary events of the 70's and 90's?
The Vietnam war ended in 1974
Reply:90's collapse of the soviet union
Reply:Energy crises in the 1970s=end to big crappy muscle cars.