Raphael Lemkin is the Polish lawyer and linguist who coined the term "genocide" — and dedicated his life to making genocide recognized as a crime. Copyright by Arthur Leipzig /Courtesy of Howard Greenberg Gallery, New York hide caption

itoggle caption Copyright by Arthur Leipzig /Courtesy of Howard Greenberg Gallery, New York

Guatemala's former dictator Efrain Rios Montt arrives in court Jan. 31 in Guatemala City to stand trial on genocide charges. On Monday, his conviction was overturned. Moises Castillo/AP hide caption

itoggle caption Moises Castillo/AP