" ""Never again "" the world has vowed time and again since the Holocaust. Yet genocide, ethnic cleansing, and other mass atrocity crimes continue to shock our consciences--from the killing fields of Cambodia to the machetes of Rwanda to the agony of Darfur. Gareth Evans has grappled with these issues firsthand. As Australian foreign minister, he was a key broker of the United Nations peace plan for Cambodia. As president of the International...