Starting from the analysis of some ethical conceptions and the psychological development we introduce the evolution of Lawrence Kohlberg's theory and the psychology of moral development. The deontological and formalist positions rooted in the moral philosophy shaped the first conceptualizations in the study of morals in psychology. Thereafter, and parallel to the debate in ethics, Psychology and Kohlberg himself became more receptive to those positions which proposed to contemplate social significations and judgments in a more contextual and flexible manner. Communitarianism and some non-cognitive reflections had some influence on the psychological study of morals; a field that also reconsidered new ages for the study of moral development, as well as it incorporated the life-cycle theories and the notions of wisdom.