The "ethnic cleansing" that has gripped the Balkans for much of this decade is but another chapter in the long history of man's inhumanity to man. Hopeful but unflinching in the face of such realities, Howard Ball's book focuses on international efforts to punish perpetrators of genocide and other war crimes. Combining history, politics, and critical analysis, he revisits the killing fields of Cambodia, documents the three-month Hutu "machete genocide"...