Samantha Power, Anna Lindh Professor of Practice Global Leadership and Public Policy at Harvard University's John F. Kennedy School of Government, discusses some of the reasons it is so hard to combat genocide and outlines a continuum of possible intervention responses. Raphael Lemkin coined the term genocide in 1944 and the United Nations adopted the Convention on the Prevention and Punishment of the Crime of Genocide four years later, but the United States did not ratify the Convention until 1988.