Book excerpt: In recent years, the question of the post-Cold War NATO, particularly in relation to the former communist countries of Europe, has been at the heart of a series of international reform debates. NATO in the "New Europe" contributes to these debates by arguing that, contrary to conventional assumptions about the role of international security organizations, NATO has been systematically involved in the process of building liberal democracy in the former communist countries of Central and Eastern Europe. The book also seeks to contribute to the development of an international political sociology of socialization. It draws on arguments developed by political theorists, sociologists, and social psychologists to examine the dynamics and implications of socialization practices conducted by an international institution.