You know the Rosa Parks story. Now, here's the rest of the story:
Those who see government as the solution to social problems may be surprised to learn that it was government which created this problem. Many, if not most, municipal transit systems were privately owned in the 19th century and the private owners of these systems had no incentive to segregate the races.
Libertarians keep saying that a government big enough to give us all we want is big enough to take all we have, but nobody listens to us.