Unlikely bedfellows Michael Bloomberg and Charles Koch have found something they agree on: Colleges are creating a generation of “coddled” students who are intolerant to opposing ideas.

In an op-ed in the Wall Street Journal, the two team up to tackle the free speech concerns permeating American campuses, and remind college students and administrators that women’s suffrage and equality were once unpopular opinions that many found offensive. Things only turned around when Americans engaged in a “robust dialogue” with their peers.