Kohlberg's Stages of Moral Development

Kohlberg's theory of the stages of moral development gave me a lot to chew on. I saw the link to this article on Alexandra Sokoloff's blog--she claims a knowledge of Kohlberg's theory is indispensable to writers. She has a point; I can see how this theory can heighten our understanding of our characters. Especially the characters who, for whatever reason, never develop past a certain stage . . .