History has shown both that revolutions are rare and not the inevitable outcome of large, even massive street demonstrations, and that when most authoritarian regimes are overthrown, they are not replaced by democracies. Moreover, while some democracies, notably those in countries of Eastern Europe like Poland or the Czech Republic as well as the Baltic states arise out of events that could be described as revolutions, most democracies take a very long time to evolve. The American democratic revolution, for example, lasted roughly two centuries beginning with the American Revolution in 1776 which brought independence, followed a few years later by the creation and approval of the U.S. Constitution, and ending when apartheid in the American south was brought to an end with the Civil Rights and Voting Rights Acts in 1964 and 1965. Some other democracies, Germany and Japan, for example, grew out of military defeat, occupation and enormous commitment of resources from other democratic countries.