Professor Robin Dunbar, famous for Dunbar's Number (the 150-person maximum for meaningful relationships), dives deep into the architecture of your social network. Learn the specific frequencies of contact that define the layers, like seeing your inner core of five friends at least once a week. Dunbar details the heavy time investment needed to forge and maintain friendships, the expense of romantic relationships replacing friends/family, and the key role of trust and shared cultural markers (the seven pillars of friendship). Discover the difference between positive and negative gossip , the cognitive skills for managing social life (like mentalizing), and why families fight so badly over things like trust and competition for resources. Listen now for a scientific look at your social world.