I'd say that the overthrow of several commuist regimes at the end of the 1980s, particularly the so-called Velvet Revolution of Czechoslovakia, were both revolutionary and peaceful. I do not study revolutions per se, but these might be the most peaceful revolutions in history, and the fact that the Soviet Union had made clear that it would not intervene had a lot to do with the relative tranquility of these movements.

The Velvet Revolution began like many others, with students protesting in mass and the police turning on the protestors. It did not take long for the communist government to give up on single-party rule and to resign in this case, however.

Quebec had a peaceful revolution in the 1960's under the liberal government of Jean Lesage. The movement, called révolution tranquille consisted of major political and social changes, with the creation of Cegeps in 1964 (a educational level between high school and university), universal health care (1970), separation of church and state following the death of Maurice Duplessis. Furthermore, political organization in Quebec changed during this period, going from a left-right split to a federalist and sovereignist separation.

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