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Transhistorical Patterns in Alliance Strategy

Given the dangers of war, states should carefully tailor their alliances to specific threats and constraints. We expect wide variety in security strategies and pact designs. This expectation is wrong. In any year, 75 percent of states pursue identical alliance strategies. Why do countries ignore their individuated conditions and converge on a single dominant alliance strategy? This chapter presents the book’s puzzle, describing patterns in alliance design from 1715–2003.