 This formulation has gained favor among Kantians in recent years (see Rawls, 1971; Hill, 1972). Many see it as introducing more of a social dimension to Kantian morality. Kant states that the above concept of every rational will as a will that must regard itself as enacting laws binding all rational wills is closely connected to another concept, that of a “systematic union of different rational beings under common laws”, or a “Kingdom of Ends” (G 4:433). The formulation of the CI states that we must “act in accordance with the maxims of a member giving universal laws for a merely possible kingdom of ends” (G 4:439). It combines the others in that (i) it requires that we conform our actions to the laws of an ideal moral legislature, (ii) that this legislature lays down universal laws, binding all rational wills including our own, and (iii) that those laws are of “a merely possible kingdom” each of whose members equally possesses this status as legislator of universal laws, and hence must be treated always as an end in itself. The intuitive idea behind this formulation is that our fundamental moral obligation is to act only on principles which could earn acceptance by a community of fully rational agents each of whom have an equal share in legislating these principles for their community.