From the bestselling author, media pioneer, and curator of TED, an inspiring book about one of humankind’s defining but overlooked impulses, and how we can super-charge its potential to build a hopeful future

“I flew through these pages with an increasing sense of joy. I hope that millions read this book.”—Elizabeth Gilbert, author of Eat, Pray, Love

Let’s face it: Recent years have been tough on optimists. Hopes that the Internet might bring people together have been crushed by the...