The Causes of the Second World War, by Andrew J. Crozier and Deadly Imbalances: Tripolarity and Hitler’s Strategy of World Conquest, by Randall L. Schweller.The Causes of the Second World War, by Andrew J. Crozier. Malden Massachusetts, Blackwell, 1997. xvi, 320 pp. $64.95 U.S. (cloth), $26.95 U.S. (paper).Deadly Imbalances: Tripolarity and Hitler’s Strategy of World Conquest, by Randall L. Schweller. New York, Columbia University Press, 1998. x, 268 pp. $57.00 U.S. (cloth), $21.50 U.S. (paper).