 Nozick’s account of rights takes a surprising turn in his very complex chapter 4 on “Prohibition, Compensation, and Risk” (Mack 1981). Employing the language of rights as moral boundaries, Nozick asks whether all actions that cross boundaries may be prohibited, i.e., may permissibly be  punished.[11]  His unexpected answer is that not all boundary crossings may be prohibited. Some boundary crossings are to be allowed—without the consent of those subject to them—as long as due compensation is paid to those subjects. Nozick’s presumption within this chapter is that it does not follow from B’s having a right against A to A’s not inflicting treatment T on B that A’s inflicting T on A may be prohibited (59). All that follows from B’s having that right is that A may not inflict T on B unless A also duly compensates  B.[12]  All that follows is that B has a claim against A that A’s infliction of T on B not leave B’s utility or welfare on net diminished.