Stimulated anew in the 1990s by the slaughter and the so-called ethnic cleansing in the former Yugoslavia, and by the horrors of Rwanda, research about and around genocide flourishes as never before. Genocide studies has now accrued a large, sophisticated, and growing, body of scholarly literature. This growth looks set to continue: historians and social scientists are increasingly casting their analytical nets further into the past to investigate whether group destruction and population expulsions have been constitutive of imperial and state expansion over millennia. And, moreover, events...