"Why We Do What We Do" is a nonfiction book by Edward L. Deci and Richard Flaste that explores the science of motivation and the factors that drive human behavior. Drawing on extensive research from psychology, neuroscience, and other fields, the authors challenge traditional notions of motivation, arguing that external rewards and punishments are often counterproductive and can undermine intrinsic motivation. Instead, they propose a model of motivation based on the innate human need for autonomy, competence, and relatedness. The book offers practical insights and strategies for promoting motivation, including the importance of providing meaningful goals, feedback, and support. It also examines the role of culture and social context in shaping motivation, and how organizations can create environments that foster intrinsic motivation and engagement. "Why We Do What We Do" is a thought-provoking and accessible exploration of one of the most fundamental aspects of human behavior.