The Stirrup: The Simplest Greatest Idea in the World

Every so often, an idea comes along that is so simple, yet so profound that you smack yourself in the head for not having thought of it yourself. Even more rare is such an idea that can have global implications. An idea that can create empires, topple kingdoms, and establish economic orders which can last for centuries. Learn more about your ad choices. Visit megaphone.fm/adchoices