Samantha Power is a leading global voice on human rights and international affairs. She served for four years as President Barack Obama's human rights adviser and then, from 2013 to 2017, in his Cabinet and as US Ambassador to the United Nations. Power is the author of several books, including the Pulitzer Prize-winning 'A Problem From Hell': America and the Age of Genocide, and has been named one of TIME's '100 Most Influential People' and one of Forbes' '100 Most Powerful Women'. Currently a professor of practice at Harvard Law School and Harvard Kennedy School, she lives in Massachusetts with her husband, Cass Sunstein, and their two children. Power immigrated to the United States from Ireland at the age of nine.