Yuval Noah Harari is a historian and philosopher whose books — "Sapiens," "Homo Deus," "21 Lessons for the 21st Century," and most recently "Unstoppable Us: How Humans Took Over the World" — have sold more than 40 million copies. He joins Rufus for a wide-ranging conversation about storytelling, life in the Stone Age, the future of democracy, and the threat of AI. --- If you enjoy this episode, check out our interviews with David Wengrow, Jennifer Raff, Christopher Ryan, Ray Dalio, and Jane McGonigal. You can listen to them ad-free by downloading The Next Big Idea app.

Sleep can enhance your creativity, lift your spirits, improve your sense of humor, and amplify your sociability. So why do so many of us struggle to get a good night's rest? Russell Foster, a professor of circadian neuroscience at the University of Oxford, says it's because we've let the frantic drumbeat of modern life drown out the steady tick-tock of our biological clocks. That's the bad news. The good news is that Russell's here to share science-backed tips that will have you catching more z's in no time. Russell's new book is "Life Time: Your Body Clock and Its Essential Roles in Good Health and Sleep." --- • To hear the Book Bite for "Life Time," download The Next Big Idea app • Have thoughts on this episode? Join us in conversation by subscribing to our newsletter on LinkedIn