It is only when those needs are met well enough, preferably in early infancy and early childhood that one develops enough of a sense of self to relate to another persons needs. This defensive style of relating leads to power struggles, rather than cooperation. This will either cause overdependence or extremely rigid autonomy, rather than furnishing children with the ability to learn the dance between closeness and independence. Babies by definition are immature and adults will remain babies emotionally when their basic childhood needs are not met. It is then that they have trouble meeting the basic needs of their own children.
Narcissism is a cry for nurturing and attention.
Narcissism is not new, it is an ancient human problem. We are all crying out. The earth is in pain. The invention of the nuclear family, to replace the extended family and the community has contributed to the breakdown of relationships and the ability to parent and results in narcissism. Not the other way around.