What if everything we think we know about the history of our species is wrong? That’s the provocative question at the heart of a new book by today’s guest, David Wengrow. Hailed as fascinating, brilliant, and potentially revolutionary, “The Dawn of Everything: A New History of Humanity” debuted at no. 2 on the New York Times bestseller list. Drawing on the latest research in archeology and anthropology, it suggests that the lives of our ancient ancestors were not nasty, brutish, and short. On the contrary, they were playful, collaborative, and improvisational—and there's a lot they can teach us about how to improve the world as we know it.

From the time she was in high school, Shellye Archambeau had one dream: she wanted to run a business. Ultimately, she pulled it off, becoming one of Silicon Valley’s first Black female CEOs. But getting there was far from easy. She had to learn how to assemble a network of mentors, overcome imposter syndrome, and challenge herself in ways she could never have imagined. The story of how she did it is the subject of her inspiring book “Unapologetically Ambitious: Take Risks, Break Barriers, and Create Success on Your Own Terms,” which was named one of the best of the year by our Next Big Idea Club curators. Today, one of those curators, Susan Cain, chats with Shellye about developing resilience, overcoming adversity, cutting yourself a break when it comes to work-life balance, and pursuing your ambition even if you’re an introvert.