I allow people to borrow books and I keep no records of the loans. Do you know, in fourteen years I have never once had a book stolen? How remarkable, that people will behave so well without being indexed. It’s not scalable, apparently; not realistic in the wider world. Above a certain threshold, it’s no longer a personal trust governed by the rules of friendship, but a tragedy of the commons, and people just steal. That’s always been the problem, I’m told: we need a better sort of human being, not a more just law. We need to change the way people think.