Abstract

We present a game-theoretic analysis of the evolution of moral agency via deontological autonomy. Unlike traditional models that rely on kin selection, reciprocity, punishment, group selection, or assortative matching, our parameter-free approach demonstrates that a “moral conception” of human behavior can emerge endogenously from the strategic dynamics of interactions. We show that deontologically autonomous agents can successfully invade a monomorphic Nashian society and eventually comprise approximately 60% of the population under random matching. We further show that with high enough assortment, deontologically autonomous agents can invade a monomorphic society of Nashians completely. Our unified framework accounts for diverse phenomena including public goods provision, coordination in stag-hunt scenarios, fair splits in Nash bargaining, and reduced aggression in hawk-dove conflicts.