This TED Talk by Kasley Killam introduces the concept of "social health" – the importance of relationships for overall well-being – arguing that it's as crucial as physical and mental health. Killam uses personal anecdotes and statistics to illustrate the negative health consequences of social isolation, highlighting the global prevalence of loneliness. She proposes a "5-3-1 guideline" for improving social health: interacting with five different people weekly, strengthening three close relationships, and dedicating one hour daily to meaningful connection. Ultimately, the talk advocates for a societal shift to prioritize social health, envisioning a future where it's as widely recognized and supported as mental health is today.