Average utilitarianism may lead to repugnant conclusions if practiced strictly. Aspects of Parfit's mere addition paradox are still relevant here: Even though "Parfit's repugnant conclusion" (mentioned above) is avoided by average utilitarianism, some generally repugnant conclusions may still obtain. For instance, if there are two completely isolated societies, one a 100-hedon society and the other a 99-hedon society, then strict average utilitarianism seems to support killing off the 99-hedon society (this violent action would increase the average utility in this scenario). This criticism is also exemplified by Nozick's utility monster, a hypothetical being with a greater ability to gain utility from resources, who takes all those resources from people in a fashion that is seen as completely immoral. Nozick writes: Utilitarian theory is embarrassed by the possibility of utility monsters who get enormously greater sums of utility from any sacrifice of others than these others lose ... the theory seems to require that we all be sacrificed in the monster's maw. It is also exemplified when Nozick writes: Maximizing the average utility allows a person to kill everyone else if that would make him ecstatic, and so happier than average.