The roots of genocide go back to the beginning of time and they continue to occur with great regularity around the world. During the 20th century alone, more people perished as a result of genocides than in all wars combined. The majority of the victims of these ethnic cleansings have been innocent civilians. Told with the aid of scholars, experts and survivors, and captured through historical footage and photographs, the four-part series, documents the organized massacres that occurred all over the world-from the Biblical age to the Crusades to the present day.