Rebel Ideas examines the power of 'cognitive diversity' - the ability to think differently about the world around us. It explains how to harness our unique perspectives, pool our collective intelligence and tackle the greatest challenges of our age - from climate change to . It draws on a dazzling range of case studies, including the catastrophic failings of the CIA before 9/11, a fatal communication breakdown on top of Mount Everest and a moving tale of deradicalisation in America's Deep South. Rebel Ideas will strengthen any team or organisation, but has dozens of individual applications, too: from the art of reinvention to the remarkable benefits of personalised nutrition. It shows us how to become more creative, how to collaborate in a world becoming more interconnected, and how to break free of echo chambers that surround us all. Millions visit xkcd.com each week to read Randall Munroe's iconic webcomic. Fans ask him a lot of strange questions: How fast can you hit a speed bump, driving, and live? When (if ever) did the sun go down on the British Empire? When will Facebook contain more profiles of dead people than living? How many humans would a T Rex rampaging through New York need to eat a day? In pursuit of answers, Munroe runs computer simulations, pores over stacks of declassified military research memos, solves differential equations and consults nuclear reactor operators. His responses are masterpieces of clarity and hilarity, complemented by comics. They often predict the complete of humankind, or at least a really big . The world's most entertaining and useless self-help guide, from the brilliant mind behind the wildly popular webcomic xkcd and the million-selling What If? and Thing Explainer. For any task you might want to do, there's a right way, a wrong way, and a way so monumentally bad that no one would ever try it. How To is a guide to the third kind of approach. It's full of highly impractical advice for everything from landing a plane to.