The document discusses several theories of human development:
- Nature vs nurture and whether heredity or environment has a greater influence
- Continuity vs discontinuity, whether development occurs through gradual or distinct changes
- Stability vs change, whether early experiences determine development or allow change
- The theories of Skinner, Erickson, and lifespan development are reviewed
The key point is that all the theories interact in complex ways to influence a person's development, rather than any single factor alone determining development. Nature and nurture, as well as the other dichotomies, work together in producing traits rather than contributing independently.