This illuminating study focuses on five cases where genocide was a matter of government policy: The Armenians and Greeks of Anatolia; The Nazi Attack on the Jews; Soviet Deportation of the Chechens-Ingush and the Crimean Tatars; The Expulsion of Germans from Poland and Czechoslovakia; and The Wars of Yugoslav Succession. Norman Naimark is director of Stanford's programs in International Relations and a senior fellow at the Hoover Institution.  (EUR179, $20.50)