A Twentieth Century Fund Book A primer for American responses to ethnic conflicts, past, present, and future.Bosnia, Rwanda, Chechnya--these names reverberate in the news for good and uring reasons as examples of a "new tribalism." But ethnic conflict has always been with us. In this timely and important book, David Callahan offers a thorough history of twentieth-century ethnic conflicts, an analysis of the failures and successes of American involvement in them, and recommations for American actions in the future.