 In the twentieth century, Russell’s set paradox raised another challenge. If there is a set for every property, there should be a set that contains all only those sets that do not contain themselves as a member. But the existence of such a set would imply a contradiction. So set theory needed to preclude this universal set. This raises concern about other totalities. The universe is, well, universal. When the monist says there is exactly one thing, he imposes an endogenous demand on that thing (Do not be two things!) and an exogenous demand on everything else (Do not exist!). This exogenous demand involves absolute generality. Normally, quantification is restricted to a domain of discourse. If this normal relativity is actually mandatory, we cannot ask the question that the monist seeks to answer: How many things are there? Any number, including zero, would require unrestricted quantification. 