The fall of the Berlin Wall didn't begin in Berlin; it began in Leipzig, with those peaceful protestors. In 1989, prayers for peace, a regular Monday-night event in the Nikolai Church, became so swollen by citizens dissatisfied with the Communist government that nonviolent demonstrations began to be held in the nearby Karl Marx Square. Towards the end of October, over 320,000 people gathered in nonviolent protest - more than half the population of the city - and by then similar protests were being held in squares of other cities in East Germany: an inexorable tide of protest that led to the toppling of the wall, the end of the East German government, and the eventual reunification of Germany. Nonviolence doesn't always succeed, of course, but even when it's beaten down by determined and ruthless opponents, it can leave behind the seeds for change. In 1968, student protests in Warsaw and the Prague Spring were swiftly subdued; yet afterwards, as Michel Gorbachev admitted, nothing was the same again. The Soviets and their puppet governments had lost credibility, and the support of the people. When they were challenged again, twenty years later, they fell apart.
Where do science fiction writers get their ideas? Isn't it obvious?