We often think of immersive computer and videogames—like "FarmVille," "Guitar Hero" and "World of Warcraft"—as "escapist," a kind of passive retreat from reality. Many critics consider such games a mind-numbing waste of time, if not a corrupting influence. But the truth about games is very nearly the opposite. In today's society, they consistently fulfill genuine human needs that the real world fails to satisfy. More than that, they may prove to be a key resource for solving some of our most pressing real-world problems.