Jean Piaget, Barbel Inhelder,et al.
As a child we think concretely and egocentrically, but as an adult we think in more principled, abstract, sociocentric ways
~ 4-7 yrs - Heteronomous Morality - rules are seen as unchangeable; we have no control over changing them
~ 10 yrs - Autonomous Morality - children become aware that rules and laws can be changed; must judge a person by intentions as well as the consequences