College presidents from about 100 of the nation’s best-known universities, including Duke, Dartmouth and Ohio State, are calling on lawmakers to consider lowering the drinking age from 21 to 18, saying current laws actually encourage dangerous binge drinking on campus.

The movement, called the Amethyst Initiative, began quietly recruiting presidents more than a year ago to provoke national debate about the drinking age.

“This is a law that is routinely evaded,” said John McCardell, former president of Middlebury College in Vermont who started the organization. “It is a law that the people at whom it is directed believe is unjust and unfair and discriminatory.”

Other prominent schools in the group include Syracuse, Tufts, Colgate, Kenyon and Morehouse.

But even before the presidents begin the public phase of their efforts, which may include publishing newspaper ads in the coming weeks, they are already facing sharp criticism.

Mothers Against Drunk Driving says lowering the drinking age would lead to more fatal car crashes.

Both sides agree alcohol abuse by college students is a huge problem.

Research has found more than 40 percent of college students reported at least one symptom of alcohol abuse or dependence. One study has estimated more than 500,000 full-time students at four-year colleges suffer injuries each year related in some way to drinking, and about 1,700 die in such accidents.

Moana Jagasia, a Duke University sophomore from Singapore, where the drinking age is lower, said reducing the age in the U.S. could be helpful.

“There isn’t that much difference in maturity between 21 and 18,” she said. “If the age is younger, you’re getting exposed to it at a younger age, and you don’t freak out when you get to campus.”