This title demonstrates how human knowledge and social structures co-evolve in complex and imperfectly predictable ways, without any guarantee of social efficiency. It uses a theoretical argument to illuminate an array of puzzling social phenomena, including the unexpected fall of communism, the paucity of open opposition to affirmative action in the United States, and the durability of the beliefs that have sustained India's caste system. Copyright (C) Muze Inc. 2005. For personal use only. All rights reserved.