Explore the groundbreaking field of positive psychology in this 24-minute TED talk by Martin Seligman. Delve into the evolution of psychology beyond its traditional focus on mental illness, examining the costs of the disease model and the potential for a more holistic approach. Discover the three types of "happy" lives - pleasant, good, and meaningful - and learn about positive interventions that can enhance well-being. Gain insights into the science behind positive psychology and its potential to help individuals flourish. Conclude with Seligman's vision for the future of psychology and his optimistic outlook on its transformative power in people's lives.