Freedom of speech is about expressing your opinion, however bad or good, however right or wrong, and being able to defend it and argue it and be argued with about it in public forums. But that's not what academic freedom is about. That's not what the classroom is about.

I don't think colleges are safe spaces. It's one thing to have a fraternity house or a community center where students can go and talk about their shared experiences. But it's another thing to have safe spaces in the sense that the university's providing them with protection from what they have to experience and find ways of protesting and resisting.

There are students whose religious upbringing is going to make them feel uncomfortable in a class where certain kinds of secular ideas are presented. There are students whose ideas about history or sexuality are going to be similarly challenged to question, to affirm or to change those ideas. That doesn't mean they shouldn't be exposed to them; that's why they're at school. That's why they come to university: to be taught how to think well and critically about material that they're being presented with. But it's the teacher who is certified to teach them how to do that.

The thing about education - and why I'm so passionate about the position and status of the university - is that it's supposed to teach citizens how to think better, how to think critically, how to tell truth from falsehood, how to make a judgment about when they're being lied to and duped and when they're not, how to evaluate scientific teaching. Losing that training of citizens is an extremely dangerous road to go down.

All of my work in some way or another speaks to political issues according to the upbringing that I had, which was deeply rooted in principles.

We've increasingly lost that sense of community, of the notion that there is something we contribute to and benefit from that is called the common good. I think I would date the beginnings of that loss to the Reagan administration and to the notion that somehow we were all separate individuals who only ought to be interested in ourselves.

The common good is the notion of shared collective responsibility and reciprocity. It's that that we've lost.