Since the late 1960s, the movies have had in place a rating system designed to inform viewers of the suitability of films for various audiences. The MPAA system enables parents to make responsible decisions about what their children view, and gives all moviegoers the opportunity to seek out entertainment that gives them pleasure and to avoid films they will find disturbing or distasteful.
Why shouldn’t a similar rating system be adopted for the courses offered at our colleges and universities?
The answer is that it would inescapably involve the policing of expression and thought and thereby destroy the freedom to dissent and follow arguments where they lead, which is the life-blood of liberal education. Yet we are already briskly moving in that direction.