For Shop Talk, we explore why did human life expectancy stick around 30-40 years old for thousands of years and then suddenly increased by 4 decades in less than 200 years!

America Is Running Out of Friends
15:37

Why Half of America Is Socially Disconnected—and What You Can Do About It (Pt 1)
35:38

Why Half of America Is Socially Disconnected—and What You Can Do About It (Pt 2)
1:08:27