I think a very important aspect of child development would be the environment that the parents foster for their child. Without parents that set a good example that allows kids to feel safe and nurtured the child will not be able to grow up with the ability to trust and all obstacles that they will eventually face.
I have to agree with this. While over-nurturing may create an enduring false sense of security, a threshold must be reached where a child feels he can trust others and rely upon other individuals as well as him or herself. Without a proper understanding of relationships, a child cannot possibly become an integral part of society.