Democratic process had little to do with it. Many of those attempted revolutions turned into civil wars. Communists won some of them. Some of the emerging comm

Democratic process had little to do with it. Many of those attempted revolutions turned into civil wars. Communists won some of them. Some of the emerging communist states were defeated by foreign military interventions. It was a bloody and confusing era in European history. The turning point was when capitalists realized that it was not possible to defeat communism by fighting the communists. They gave in and started supporting some of the goals of social democrats and moderate socialists. That deradicalized enough people that even revolutionary communists had to start working within the system. Revolutions are pretty common around the world. The recent ones have not been motivated by communism or anything similar, but that could change. The world is unpredictable, and major changes happen once in a while.