Great groups have shaped our world, from the gathering of young geniuses at Los Alamos who unleashed the atom, to the youthful scientists and hackers who invented a computer that was personal as well as powerful. That should hardly surprise us. In a society as complex and technologically sophisticated as ours, the most urgent projects require the coordinated contributions of many talented people. Whether the task is building a global business or discovering the mysteries of the human brain, one person can’t hope to accomplish it, however gifted or energetic he or she may be. And yet, even as we make the case for collaboration, we resist the idea of collective creativity. Our mythology refuses to catch up with our reality. And so we cling to the myth of the Lone Ranger, the romantic idea that great things are usually accomplished by a larger-than-life individual working alone.