Furthermore, the social contract makes sense only if future generations are included in it. The purpose is to establish an enduring society. At once, therefore, there arises that web of non-contractual obligations that links parents to children and children to parents and that ensures, willy-nilly, that within a generation the society will be encumbered by non-voting members, dead and unborn, who will rely on something other than a mere contract between the living if their rights are to be respected and their love deserved. Even when there arises, as in America, an idea of 'elective nationality', so that newcomers may choose to belong, what is chosen is precisely not a contract but a bond of membership, whose obligations and privileges transcend anything that could be contained in a defeasible agreement.