Responsibility to Protect

"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 Cam...