A human’s psychosocial development from baby to adulthood is the result of physical characteristics and environmental ones; their beliefs, attitudes and the way they act. In other words, not just determined by the genetics but also from nurture. Nurture means how and where you were raised, the people, things and all in your external stimulus as part of your childhood and how this impacts who you are. Personality develops through socialization we have to interact with other humans in order to gain skills and be humans!
Different psychologists created various ways of observing human conduct and created different, mostly mutually inclusive theories that divided psychological development into parts and stages, given the abstract physical-mental mix that defines our own self-observation, Psychology and Sociology (And Económics and Marketing for that matter) are subjects that aren’t totally biological and physical, not totally humanistic either, in other words not limited to the intelligible but non-physical world of the mind, a wonderful dichotomy that projects the true inquisitorial nature of our ever searching nature. This great video from the Crash Course Project by my favorite Green Brothers and in this case, a beautiful and funny friendly geeky chick gives us a tour across “The Role of Nature and Nurture”, The Evils of Social Isolation, and 5 theories of development: Freud’s Psychodynamic theory, Piaget’s Four Stages of Cognitive Development, Kohlberg and Gilligangs Theories of Moral Development, MEads Theory of Self, Erik Erikson’s Stages of Life,