A Washington Post op-ed by William Frey of the Brookings Institution, a population studies professor at the University of Michigan, makes a good case for lowering the voting age.

Frey writes that “nearly half of the nation’s under-18 population is made up of racial minorities, while 70 percent of voting-age citizens are white. The United States is undergoing a boom in demographic diversity, but it’s the younger population that’s being transformed first,” and it is not being represented. In fact, 23% of the total U.S. population is below the age of 18.