"What the [US civil rights] movement proved, however, is that even if people lack the customary attributes of power -- money, political authority, physical force -- as did the black people of the Deep South, there is a power that can be created out of pent-up indignation, courage, and the inspiration of a common cause, and that if enough people put their minds and bodies into that cause, they can win. It is a phenomenon recorded again and again in the history of the popular movements against injustice all over the world.
. . .
When that might happen is uncertain. If that can happen is also uncertain. But not to believe in the possibility of dramatic change is to forget that things have changed, not enough, of course, but enough to show what is possible. We have been surprised before in history. We can be surprised again. Indeed, we can do the surprising."
Howard Zinn, from You Can't Be Neutral On A Moving Train, A Personal History Of Our Times