In 1917, a brilliant British officer developed a way to use an emerging military technology: the tank. The British army promptly squandered the idea – but the Germans did not. Blitzkrieg, the devastating advance of German tanks across Europe in 1940, was invented by the British. This is a common story: Sony invented the forerunner of the iPod, Xerox the personal computer, and Kodak the digital camera. In each case they failed to capitalize on the idea. Why? Read more about Tim's work at http://timharford.com/