The twentieth century has been described, not without justification, as the 'Century of Genocide'. Whole groups of people have been targeted for slaughter because of their ethnicity or religion, from Armenia to Rwanda. Against this background, how are we to understand the command in Deuteronomy to 'not leave alive anything that breathes' of the Canaanite nations present in the Promised Land (Deut 20.17-18)? In this penetrating study, Milner...