 While much discussion of new natural law accounts of marriage oscillates between attacking and defending the basis in biological sex difference, some theorists sympathetic to new natural law attempt to avoid the Scylla of rigid biological restrictions and the Charybdis of liberal “plasticity” regarding marriage (Goldstein 2011). Goldstein, for one, offers an account of marriage as a project generated by the basic good of friendship; while this project includes procreation as a core feature, the institution of marriage has, on this account, a compensatory power, meaning that the institution itself can compensate for failures such as inability to procreate. Such an account grounds marriage in the new natural law account of flourishing, but it also allows the extension to same-sex marriage without, according to Goldstein, permitting other forms such as polygamy.