A friend in Canada recently asked me if the Sixties’ protests had any important lessons to pass on to the Occupy movement. I told her that one of the few clear memories that I retain from 45 years ago was a fervent vow never to age into an old fart with lessons to pass on. But she persisted and the question ultimately aroused my own curiosity. What, indeed, have I learned from my fumbling-and-bungling lifetime of activism?