In his fascinating op-ed in yesterday’s NY Times, “A Grand Bargain Over Evolution”, Robert Wright quotes the well-known experimental psychologist Steven Pinker:

“There may be a sense in which some moral statements aren’t just … artifacts of a particular brain wiring but are part of the reality of the universe, even if you can’t touch them and weigh them.” Comparing these moral truths to mathematical truths, he said that perhaps “they’re really true independent of our existence. I mean, they’re out there and in some sense — it’s very difficult to grasp — but we discover them, we don’t hallucinate them.”