Over the last few centuries, power gradually shifted to the firm, then to markets, and now finally to individuals. Used to be, you had to pick the right parents, pick the right industry, and hope the political winds don't shift against you to earn a decent, livable life.
Now, all you need is intelligence and mental fluidity to weather hardships. No longer is a job loss catastrophic. Just about anyone born in a Western nation can, if he decides to, gain an education and make his way up the social ladder.
This is completely unprecedented from a historical perspective. The ability of the not-well-off to earn and enjoy the benefits of education was far and away only the province of the extremely gifted, the John Rockefellers of the world. It's easier than ever for someone born dirt-poor to become a CEO or politician.
Soon the world will turn completely on merit. It'll be fascinating to watch the way our societies go next. Certainly affluence will continue to push out into the developing world. But how will modern Western societies evolve? Will we conquer aging and produce scions of unimaginable ability? Death is the ultimate limiter of the power of individuals.