This Chapter is concerned with cases in which we are justified in performing an otherwise prohibited action but not required to perform it. My discussion focusses on cases in which conduct is permitted because it amounts to a ‘lesser evil’. What interests me is the curious nexus that these cases illustrate between justifying reasons and the conclusion that conduct is either permitted or required. So-called reason-based or ‘reasons-first’ accounts hold that our normative conclusions—our conclusions about what we are required to (...) do and what is permissible—are explained by our practical reasons. It is difficult to offer a reason-based account of lesser evils justifications that does not collapse the distinction between the required and the permissible with respect to justified conduct. Some justifying reasons generate mere permissions, rather than requirements. I consider several prominent attempts to account for the distinction. I conclude by suggesting that none of these attempts is adequate without the further concession that some reasons lack deontic or requiring force. (shrink)

Reasons-based accounts of our normative conclusions face difficulties in distinguishing between what ought to be done and what is required. This article addresses this problem from a formal perspective. I introduce a rudimentary formalization of a reasons-based account and demonstrate that that the model faces difficulties in accounting for the distinction between oughts and requirements. I briefly critique attempts to distinguish between oughts and requirements by appealing to a difference in strength or weight of reasons. I then present a formalized (...) reasons-based account of permissions, oughts and requirements. The model exploits Joshua Gert (2004; 2007) and Patricia Greenspan’s (2005; 2007; 2010) suggestion that some reasons perform a purely justificatory function. I show that the model preserves the standard entailment relationships between requirements, oughts and permissions. (shrink)