| "the theoretical giant of communist thought: whose prophecies are still hotly debated. | |
| Criminals bore a greater resemblance to apes than non-criminals. | |
| Argues that societies evolve from lower to higher forms. | |
| Was inspired by the work of Piaget. Concluded that given the proper experience and stimulation, children go through a sequence of six stages of moral reasoning. This person has been criticized for basing his model of human development on the male experience |