For those who missed it, there's an interesting essay by Steven Pinker in today's NY Times Magazine on human beings' moral instincts. Here's a taste:

The findings of trolleyology complex, instinctive and worldwide moral intuitions led Hauser and John Mikhail (a legal scholar) to revive an analogy from the philosopher John Rawls between the moral sense and language. According to Noam Chomsky, we are born with a universal grammar that forces us to analyze speech in terms of its grammatical structure, with no conscious awareness of the rules in play. By analogy, we are born with a universal moral grammar that forces us to analyze human action in terms of its moral structure, with just as little awareness.The idea that the moral sense is an innate part of human nature is not far-fetched. A list of human universals collected by the anthropologist Donald E. Brown includes many moral concepts and emotions, including a distinction between right and wrong; empathy; fairness; admiration of generosity; rights and obligations; proscription of murder, rape and other forms of violence; redress of wrongs; sanctions for wrongs against the community; shame; and taboos.The stirrings of morality emerge early in childhood. Toddlers spontaneously offer toys and help to others and try to comfort people they see in distress. And according to the psychologists Elliot Turiel and Judith Smetana, preschoolers have an inkling of the difference between societal conventions and moral principles. Four-year-olds say that it is not O.K. to wear pajamas to school (a convention) and also not O.K. to hit a little girl for no reason (a moral principle). But when asked whether these actions would be O.K. if the teacher allowed them, most of the children said that wearing pajamas would now be fine but that hitting a little girl would still not be....The moral sense, then, may be rooted in the design of the normal human brain. Yet for all the awe that may fill our minds when we reflect on an innate moral law within, the idea is at best incomplete. Consider this moral dilemma: A runaway trolley is about to kill a schoolteacher. You can divert the trolley onto a sidetrack, but the trolley would trip a switch sending a signal to a class of 6-year-olds, giving them permission to name a teddy bear Muhammad. Is it permissible to pull the lever?This is no joke. Last month a British woman teaching in a private school in Sudan allowed her class to name a teddy bear after the most popular boy in the class, who bore the name of the founder of Islam. She was jailed for blasphemy and threatened with a public flogging, while a mob outside the prison demanded her death. To the protesters, the womans life clearly had less value than maximizing the dignity of their religion, and their judgment on whether it is right to divert the hypothetical trolley would have differed from ours. Whatever grammar guides peoples moral judgments cant be all that universal. Anyone who stayed awake through Anthropology 101 can offer many other examples.Of course, languages vary, too. In Chomskys theory, languages conform to an abstract blueprint, like having phrases built out of verbs and objects, while the details vary, like whether the verb or the object comes first. Could we be wired with an abstract spec sheet that embraces all the strange ideas that people in different cultures moralize?