Paul Bloom

The irrationality of disgust suggests it is unreliable as a source of moral insight. There may be good arguments against gay marriage, partial-birth abortions and human cloning, but the fact that some people find such acts to be disgusting should carry no weight.

Some scholars argue that although the brain might contain neural subsystems, or modules, specialized for tasks like recognizing faces and understanding language, it also contains a part that constitutes a person, a self: the chief executive of all the subsystems.

Morality is often seen as an innovation, like agriculture and writing. From this perspective, babies are pint-sized psychopaths, self-interested beings who need to be taught moral notions such as the wrongness of harming another person.

Part of the satisfaction of tattling surely comes from showing oneself to adults as a good moral agent, a responsible being who is sensitive to right and wrong. But I would bet that children would tattle even if they could do so only anonymously. They would do it just to have justice done.

If Inigo Montoya were around now, he wouldn't need to storm the castle to bring his father's murderer to justice; the police would do it for him, and fewer people would have to die.

We benefit, intellectually and personally, from the interplay between different selves, from the balance between long-term contemplation and short-term impulse. We should be wary about tipping the scales too far. The community of selves shouldn't be a democracy, but it shouldn't be a dictatorship, either.

Having kids has proven to be this amazing - for me, this amazing source of ideas of anecdotes, of examples, I can test my own kids without human subject permission, so they pilot - I pilot my ideas on them. And so it is a tremendous advantage to have kids if you're going to be a developmental psychologist.

We know that young babies, as they become capable of moving voluntarily, will share. They will share food, for instance, with their siblings and with kids that are around. They will sooth. If they see somebody else in pain, even the youngest of toddlers will try to reach out and pat the person.

It's really difficult working with kids and with babies because they are not cooperative subjects: they are not socialized into the idea that they should cheerfully and cooperatively give you information. They're not like undergraduates, who you can bribe with beer money or course credit.

A sympathetic parent might see the spark of consciousness in a baby's large eyes and eagerly accept the popular claim that babies are wonderful learners, but it is hard to avoid the impression that they begin as ignorant as bread loaves.

The genetic you and the neural you aren't alternatives to the conscious you. They are its foundations.

Maybe one of the most heartening findings from the psychology of pleasure is there's more to looking good than your physical appearance. If you like somebody, they look better to you. This is why spouses in happy marriages tend to think that their husband or wife looks much better than anyone else thinks that they do.