Over the past few years we’ve grown used to the iconography of protest. In the wake of the Arab Spring, images of angry young street demonstrators shouting slogans, wielding signs, and confronting security forces have become almost commonplace. But just as often we’ve seen campaigns of public protest flounder or go into reverse: just look at Egypt and Libya, to name the most prominent cases. The recent surge of street demonstrations in Sudan once again confronts us with a fundamental question: How does public protest undermine authoritarian governments? Are demonstrations really the key to toppling autocrats?