When Matthieu Ricard was in his 20s and studying molecular biology, he traveled to India to meet a Buddhist master he saw in a movie. Soon afterwards, Ricard left behind a promising career in science for a quiet, anonymous life as a Buddhist monk. In the late 1990s, he published “The Monk and the Philosopher,” a dialogue with his father that became an international bestseller. In his latest book, Ricard argues that altruism is the key to solving major world problems like inequality and climate change. He joins us to talk about how consideration for others can solve the challenges of our modern world.