The financial crisis of 2008 was tough for the country, but the real impact will hit colleges in the year 2026.

It turns out the fiscal anxieties coincided with a dramatic birth dearth—a reduction in the number of children born, which means that the number of kids hitting traditional college age will drop almost 15 percent around 2026. That could amount to a crisis for colleges, unless they start planning now.

That’s the argument of Nathan Grawe, an economics professor at Carleton College. He’s author of a new book with a very straightforward title: Demographics and the Demand for Higher Education. EdSurge recently sat down with Grawe, who described how this slow-moving storm raises existential questions for higher education.