The natural world is full of cooperation, from tiny cells to packs of wolves. But all of this teamwork, however impressive, evolved for the amoral purpose of successful competition. And yet somehow we, with our overgrown primate brains, can grasp the abstract principles behind nature’s machines and make them our own. On these pastures, something new is growing under the sun: a global tribe that looks out for its members, not to gain advantage over others, but simply because it’s good.