Is war an inevitable outcome of competing interests in a complex society? In other words, would war be the same even if human nature were very different? There are mathematical models of large groups working together that lead to conflict on a reliable basis. So there's a whole other view of war that is not psychological at all.

At a minimum if we can just have enough distribution of clout in society so it isn't run by a tiny minority, then at the very least it gives us some room to breathe.

To me, to say that war isn't evil is to say that nothing is evil.

In fact, one reason I am interested in developing things in virtual reality is that they're so fascinating. I can come up with problems that are harder than warfare to take up people's time.

Human beings either function as individuals or as members of a pack. There's a switch inside us, deep in our spirit, that you can turn one way or the other. It's almost always the case that our worst behaviour comes out when we're switched to the mob setting. The problem with a lot of software designs is that they switch us to that setting.

I have been around military technology people a lot because of my role in virtual reality I've seen weapons from conception to implementation. And there is an extraordinary gadget lust that drives the military. So it's possible that war is just the ultimate expression of creativity.

Separation anxiety is assuaged by constant connection. Young people announce every detail of their lives on services like Twitter not to show off, but to avoid the closed door at bedtime, the empty room, the screaming vacuum of an isolated mind.