 However, not all libertarians—those who endorse the principle of self-ownership—agree with the theory of justice in acquisition that we find in Nozick’s work. According to some philosophers, sometimes referred to as left-libertarians, the principle of self-ownership should be combined with a more egalitarian principle of division of initially unowned external resources. Thus, if we imagine a group of people who find themselves transported to a previously uninhabited planet, the left-libertarian holds that each of these people has the rights of self-ownership plus a right to an equal, per capita share of this planet’s initially unowned external resources (see, for example, Steiner 1994, and Vallentyne and Steiner 2000a,b).