Who believed that moral development, like cognitive development, follows a series of stages? erik erikson jean piaget lawrence kohlberg sigmund freud?

Lawrence Kohlberg believed that moral development, like cognitive development, follows a series of stages.

Lawrence Kohlberg developed the stage theory of moral development in 1958. His theory is based on Jean Piaget's theory of moral judgment for children (1932). The stages are:
Preconventional level

Punishment/obedience orientation
Instrumental purpose orientation
Conventional level
Good Boy/Nice Girl orientation
Law and order orientation
Postconventional or principled level
Social contract orientation
Universal ethical principle orientation