Why do people make decisions based on their own perspective without considering alternative points of view? Do differences of opinion enhance or obstruct critical thinking? Is it wise to seek out people who disagree with you and listen to their objections to your conclusions? Focusing on the theory, research, and application of constructive controversy, this book analyses the nature of disagreement among members of decision-making groups, project teams, academic study groups, and other groups that are involved in solving problems. Johnson demonstrates that this theory is one of the most effective methods of enhancing creativity and innovation, decision making, teaching, and political discourse. The book includes entertaining and intriguing examples of how constructive controversy has been used in a variety of historical periods to advance creativity, achieve innovations, and guide democracies. It will be welcomed by students in the fields of social psychology, management/business studies, education, and communication studies.