Edward L. Deci and Richard Flaste challenge the traditional idea that rewards and punishments are the best ways to motivate people, arguing instead for the power of "intrinsic motivation." Drawing on decades of psychological research, they explain that true engagement comes from within, fueled by the three basic human needs: autonomy, competence, and relatedness. The book demonstrates how "carrot-and-stick" approaches can actually undermine creativity and long-term persistence by making people feel controlled rather than empowered. It offers a compelling look at how to foster an environment-whether in the office, the classroom, or at home-that encourages people to take responsibility and find genuine interest in their tasks.