What if Plato, Buddha, and Jesus held the secrets to modern happiness? In The Happiness Hypothesis, Jonathan Haidt puts ten great ideas from ancient wisdom under the microscope of 21st-century science. From the nature of love and virtue to the sources of true meaning, this landmark book bridges the gap between the world's greatest thinkers and cutting-edge psychology. Prepare to challenge your assumptions and discover a powerful, evidence-based roadmap for living a wiser, more satisfying life in our complex modern world.