Moral development in adults

Lawrence Kohlberg's three stages of developmental progression from early infancy to adulthood maps almost perfectly onto Jean Piaget's psychology of child development.

What is important to note is that these stages also describe adults. Some people never get mature and may have no real moral compass (sometimes associated with psychopathy.) Then we all know people who are bound to the conventional stage where their image is most important. Those who don't develop past this stage are rigid in following the rules or the law.