Not to argue, but to make a philosophical assertion merely, but if it is a necessary condition for reaching 18 that you be reared by others, then that condition is always implicit in those 18 and over.
I've seen the "soaring heights" of individualism tried, several times, while living in the North. Many come hoping to be self-sufficient (as opposed to self-reliant), and they fail. Miserably. In "madness and want", as Emerson put it. Bullets, fishhooks, at least a knife or axe, all products of other men's labor, are required. No man is an island.