People have been thinking about happiness for thousands of years. In fact, ancient thinkers came up with strategies for cultivating pleasures over a lifetime, or creating a lasting capacity to take joy in the world. This long-term flourishing is different from immediate pleasures — it’s a richer notion of happiness. Laurie Santos is a professor of psychology at Yale and an expert on human cognition and the cognitive biases that impede better choices. She’s joined by Yale philosophy professor Tamar Gendler. Their conversation sheds light on the modern science behind ancient discoveries.