I have been listening to this endlessly lately

Physician and social scientist Nicholas Christakis explains how face-to-face social networks and their structures influence behaviors and phenomena in human society and the natural living world: Nicholas Christakis: How Do Our Social Networks Affect Our Health?

What does it take to change the world for the better? This hour, TED speakers explore ideas on activism—what motivates it, why it matters, and how each of us can make a difference: TED Radio Hour

Historian Yuval Harari explains how human imagination powered the growth and spread of homo sapiens around the world: Yuval Harari: Why Did Humans Become The Most Successful Species On Earth?