John D. Rockefeller was an innovator of sorts, creating the mother of all monopolies in Standard Oil and being called the world’s first billionaire when his personal wealth reached 10 digits in 1916. If he were alive today, he’d be just another member of the exclusive-but-not-as-exclusive-as-it-was-before club of 1,587 billionaires around the planet, according to Forbes. Uber-wealth is spreading around the world, but the U.S. is still tops on the list with 492 billionaires. “Worldwide, 95% of wealth creators and 91% of wealth inheritors are married, says Barbara Wall, Europe research editor at Cerulli Associates. “So the best [wealth management] providers don’t service high-net-worth individuals, they service [high-net-worth] families.”