 Most libertarians, then, accept something like what’s come to be known as the Lockean proviso. This proviso holds that appropriation is permissible if “enough and as good” be left for others. There’s an extensive debate over how exactly this proviso is to be understood. Nozick interprets the proviso to require that no one can be made worse off as a result of use or appropriation, compared with a baseline of non-use or non-appropriation. But this interpretation is problematic for at least two reasons. First, this such a welfare-based constraint on the exercise of people’s natural right to appropriate seems ill-motivated within Nozick’s theory. In general, the exercise of our rights isn’t usually constrained by a non-worsening requirement. Second, Nozick’s proviso is vulnerable to the objection (raised by Cohen 1995) that, as long as property owners compensate non-owners only slightly over the pre-appropriation baseline (which is likely quite low), non-owners are not wronged. This would be true even if the owners extracted almost all of the benefits of cooperation, and that seems unfair.