Two weeks ago I said, "I never met a moral principle I could trust." One reader responded: Generalizations and abstractions are treacherous indeed, but we need them for directionality and efficacy.

Moral principles are universal dos and don’ts, best understood as constraints on what you do. Of all the things you could do, moral principles urge particular actions, a constrained set of acceptable ...

How do kids develop a sense of right and wrong? Have you ever wondered why some people stand up for what's right while others struggle to make good choices? Psychologist Lawrence Kohlberg had the same ...