Samantha Power tells a story of a complicated hero, Sergio Vieira de Mello. This UN diplomat walked a thin moral line, negotiating with the world's worst dictators to help their people survive crisis. It's a compelling story told with a fiery passion. Samantha Power is head of Harvard's Carr Center for Human Rights Policy, where she studies US policy as it relates to human rights, genocide and war. She's the author of a famous memo (in policy circles) suggesting that US foreign policy is utterly broken -- that the United States must return to a human rights-centered foreign policy or risk its prestige and respect in the world community. Her latest book is about Sergio Vieira de Mello, a UN diplomat who worked with the world's worst dictators to help protect the human rights of their people. Power is also a journalist of fearless reputation. She spent 1993 to '96 reporting in the former Yugoslavia, and now contributes reportage and commentary to the New Yorker and Time. Her other books include - A Problem from Hell: America and the Age of Genocide. "We need voices like Samantha Power." - Richard Holbrooke