This book is about "speaking truth to power." It contains word-pictures of dozens of iconoclasts who (ironically) themselves became icons. But they inspire us to keep up the momentum of change. However, the author does set outer limits, because change has often taken history to places where it shouldn't go. The book is predicated on an understanding that Prophecy is less about foresight, and more about insight. "The words of the prophets are written on the subway walls… in tenement halls…" indeed. Change is interruptive by nature and change agents are always provocative.