This interview podcast features Derek Thompson interviewing University of Chicago professor Nick Epley about his research on human social interaction. The podcast explores Epley's findings that people consistently underestimate the positive impact of socializing, often mistakenly prioritizing solitude. Epley details experiments conducted on public transportation, demonstrating that even brief conversations significantly improve commuters' moods, contradicting their prior expectations. He emphasizes the importance of voice and in-person interaction over text-based communication for genuine connection, advocating for cultivating habits of small, frequent social interactions to enhance overall well-being. The interview concludes with practical advice on improving "social fitness" by intentionally engaging in everyday social interactions, highlighting the cumulative positive effect of these small acts on happiness.