 Evolutionary views are, again, the newest approach. The approach arguably originates in Bryan Skyrms (1996). But Gerald Gaus (2011) is today the most well-known proponent of such a view. Evolutionary views are new because they react to perceived failures of other approaches. Gaus, for instance, rejects bargaining views, claiming that parties to public justification must be intrinsic rule-followers. We can follow rules that frustrate our goals. Gaus argues that agents who follow moral rules for instrumental reasons cannot sustain cooperation because its members still have reason to defect when others cooperate. Moral agency, he concludes, must allow us to decline to maximize the satisfaction of our goals.