ON MAY 14TH, 1984, MARK ZUCKERBERG was born in Westchester County, N.Y., to a dentist and a psychiatrist. Twenty years later, he launched the initial version of “Thefacebook” out of his Harvard dorm room. In August, a decade after opening to its first members, Facebook had one billion users in a single day. Zuckerberg is undoubtedly brilliant. But what if he had been born into a working-class family in Nigeria or Kenya? Would Facebook exist? Would the social-media revolution have unfolded in the same way? It’s impossible to know. But for too long, much of the world’s talent has been shut out of the global economy. In the future, raw ability will be more important than the circumstances of one’s birth, reinforcing this fundamental truth: Brilliance and talent are evenly distributed, opportunity is not.