Rethinking the WorldStunning shifts in the worldviews of states mark the modern history of international affairs: how do societies think aboutand rethinkinternational order and security? Japan's "opening," German conquest, American internationalism, Maoist independence, and Gorbachev's "new thinking" molded international conflict and cooperation in their eras. How do we explain such momentous changes in foreign policyand in other cases their equally surprising absence?