The nation’s current political polarization will be no match for its shifting demographics

Like a soothsayer peering into a crystal ball to forecast things yet to occur, demographer William “Bill” Frey scrutinizes national census trends to divine that soon — well within the reach of most Americans alive today — the U.S. population will have no racial majority group.

“This milestone signals the beginning of a transformation from the mostly white baby boom culture that dominated the nation during the last half of the twentieth century to the more globalize...