Book excerpt: This book examines the extent to which German foreign policy has changed since unification, and analyzes the fundamental reasons behind this change. The book has three main aims. The essays develop theories of foreign policy to predict and explain Germany's foreign policy behavior. They test competing predictions about German foreign policy behavior since unification in several issue areas. They also assess the much-debated question as to whether post-unification Germany's foreign policy is marked by continuity or change.