What has changed are the students. Yes, there has been a lot of ideological indoctrination in which kids are taught that taking offense gives them power. But, again, that idea is old. What’s new is the way kids are being raised.

Consider play. Children are hardwired to play. That’s how we learn. But what happens when play is micro-managed? St. Lawrence University professor Steven Horwitz argues that it undermines democracy.

Free play — tag in the schoolyard, pickup basketball at the park, etc. — is a very complicated thing. It requires young people to negotiate rules among themselves, without the benefit of some third-party authority figure. These skills are hugely important in life. When parents or teachers short-circuit that process by constantly intervening to stop bullying or just to make sure that everyone plays nice, Horwitz argues, “we are taking away a key piece of what makes it possible for free people to be peaceful, cooperative people by devising bottom-up solutions to a variety of conflicts.”