Simon Sinek: "Strong Thigh Muscles = More friends", This Is Why You Can't Make Friends!
Summary
The main theme is that loneliness stems from architecting our lives away from social connection, a skill we've lost in the age of technology and social media. The conclusion is that true friendship, despite the lack of formal instruction, is a vital "biohack" for health and happiness, and it's never too late to learn how to cultivate it.