Socialization...

Without society, we don't have much more subject to being molded into anything. We are impressionable, and whatever substitutes for social interaction in our surroundings has a huge influence on our behavior and who we become. Take, for example, Oxana. She had no social interaction with humans, so the dogs began to substitute for the companionship of human guardians, and she picked up the dogs' behavioral traits.
The basis of Charles Cooley's "Looking Glass Self" theory is that a person's interactions with other people and social experiences are what gives a person their sense of self. The theory states that we gain our identity based on other people's perceptions of us. Another similar theory is George Herbert Mead's "Role-Taking" theory. The basis of this theory is that children will imaginatively assume the roles of those important to them, like a mother, for instance. He thinks that your sense of self develops out of communication.
Genie's story complements both Cooley's and Mead's work, because due to her lack of interaction with others, Genie didn't take on the characteristics typical of a thirteen-year-old girl. Since she didn't have much social interaction, her mind and behavior was still like that of an infant. This supports these theories about sense of self. Genie's delayed development was largely caused by the absence of a family setting, which plays a crucial role in both the Role-Taking theory and the Looking Glass Self theory.
After viewing the videos, I have taken the nurture side in the nature versus nurture debate. I support this side of the argument because if heredity was the main contributor in development, the feral children would naturally have had more human behaviors. But it was their surroundings that appeared to play the biggest role in their development. They picked up on the habits of the animals they lived with, so it looks to me as if the nurture of these children overcame their human nature.