 Complete the following phrase:  Blood and Soil: A World History of Genocide and Extermination from Sparta to Darfur  is a 2007 book by Ben Kier, who for thirty years has studied genocide and crimes against humanity. In Blood and Soil Kier examines outbreaks of mass violence, including worldwide colonial exterminations and twentieth-century case studies, particularly the Armenian genocide, the Nazi Holocaust, Stalins mass murders, and the Cambodian and 