Book excerpt: In this new book, David Callahan offers a thorough history of ethnic conflicts both before and after the fall of Communism. He outlines the failures and successes of American diplomacy's haphazard approaches to this strife, and offers compelling evidence of the need for a consistent American policy toward ethnic conflict, a policy that should extend beyond the peace of individual countries to international trade, economics, the environment, and more. Callahan's sensible recommendations for how to predict and prevent ethnic conflicts - and intervene when necessary - will prove invaluable for all those interested in the global power of the United States in the next century.