The Next Big Idea presents an audio masterclass from bestselling author Susan Cain. Drawing on her latest book, "Bittersweet: How Sorrow and Longing Make Us Whole," Susan shares practical insights that you can use to bolster your creativity, deepen your connections, and find joy. Susan Cain is the author of two New York Times #1 bestsellers, "Bittersweet" and "Quiet: The Power of Introverts in a World That Can't Stop Talking." She's also one of our curators here at the Next Big Idea Club. To learn more about her work, visit susancain.net. If you enjoy this episode, we invite you to join our community by downloading the Next Big Idea app, where you can listen to e-courses by brilliant authors like Shankar Vedantam, Lisa Feldman Barrett, and Surgeon General Vivek Murthy. Visit nextbigideaclub.com/app.

If the human race lasts as long as a typical mammalian species and our population continues at its current size, then there are 80 trillion people yet to come. Oxford philosophy professor William MacAskill says it's up to us to protect them. In his bold new book, "What We Owe the Future," MacAskill makes a case for longtermism. He believes that how long we survive as a species may depend on the actions we take now. --- To hear the Book Bite for "What We Owe the Future," download the Next Big Idea app at nextbigideaclub.com/app