Here, we argue for a mathematical equation that captures desert. Our procedure consists of setting out principles that a correct equation must satisfy and then arguing that our set of equations satisfies them. We then consider two objections to the equation. First, an objector might argue that desert and well-being separately contribute to intrinsic goodness, and they do not separately contribute. The concern here is that our equations treat them as separate contributors. Second, our set of desert-equations are unlike equations (...) in science because our equations involve multiple desert-equations with the applicable equation depending on how the variables are filled out. Neither objection succeeds. (shrink)

I argue that, each of the following, appropriately clarified to yield a noteworthy thesis, is true. Moral obligation can affect moral responsibility. Obligation succumbs to changes in responsibility. Obligation is immune from changes in responsibility.

Fred Feldman has proposed a desert-adjusted version of utilitarianism,, as a plausible population axiology. Among other things, he claims that justicism avoids Derek Parfit's. This paper explains the theory and tries to straighten out some of its ambiguities. Moreover, it is shown that it is not clear whether justicism avoids the repugnant conclusion and that it is has other counter-intuitive implications. It is concluded that justicism is not convincing as a population axiology.