  Constraints like (W), (HCP), and (HPP) require clarification. To apply (W) we need to know what makes something morally wrongful. Plausibly enough, it is morally wrongful to \(\phi\) only if there is decisive reason not to \(\phi\). But while this is necessary, it may not be sufficient. I have decisive reason not to go out in the rain without my umbrella. But it does not seem morally wrongful to do so (Tadros 2016, 11–46). Whatever the correct criterion, we must ask how law-makers are to apply it. Are law-makers to ask whether most members of society believe \(\phi\)ing to be morally wrongful—a matter of conventional morality—or are they to ask whether this is what members would ideally believe—a matter of critical morality (Hart 1963; Devlin 1965)? We must also ask whether just any morally wrongful act will do. Some wrongful acts also violate rights, such that those who commit them wrong others. On one view, it is only when \(\phi\)ing meets this additional test that it is permissible to criminalize \(\phi\)ing (Feinberg 1984; Stewart 2010).