Families survive the terrible twos because toddlers aren't strong enough to kill with their hands and aren't capable of using lethal weapons.

Individuals differ in how empathic they are. Some people would really flinch if they watched me hitting my hand with a hammer, and other people would just not care.

Over the last few years, I've been focusing on questions having to do with the self, and questions having to do with morality. I'm very interested in why we do good things, or bad things, and where moral judgments come from.

I'm really interested in the pleasure we get from stories and the pleasure we get from movies, and certainly the pleasure we get from virtual experiences. My complaint is against empathy as a moral guide. But as a source of pleasure, it can't be beat.

My book is going to be called Against Empathy, which may give you a feeling for where my argument is going to go. Whenever I talk about this, I have to begin in the most boring of all possible ways: by defining my terms. By "empathy," some people mean everything that is good - compassion, kindness, warmth, love, being a mensch, changing the world - and I'm for all of those things. I'm not a monster.

I think there's some evidence that we're empathic by nature. There is some evidence from studies of babies and young children that they resonate with the pain of others, and there's some work by Frans de Waal that other primates also resonate with the pain of others.

A religion such as Judaism or Catholicism might survive even if it comes to reject a literal account of God creating man and animals. But it cannot survive the rejection of an immaterial soul.