Among the greatest intellectual heroes of modern times, Raphael Lemkin lived an extraordinary life of struggle and hardship, yet altered international law and redefined the world's understanding of group rights. He invented the concept and word "genocide" and propelled the idea into international legal status. An uncommonly creative pioneer in ethical thought, he twice was nominated for the Nobel Peace Prize. Although Lemkin died alone and in poverty, he left behind a model for a life of activism, a legacy of major contributions to international law, and--not least--an unpublished...