On the Moral Functions of Language

Previous comparisons of language and morality have taken a cognitively internalist (i.e., within-minds) perspective. We take a socially externalist (i.e., between-minds) perspective, viewing both language and morality as forms of social action. During human evolution, social cognitive adaptations for cooperation evolved, including cooperative communication (social acts to mentally coordinate with others for common goals) and social normativity (social acts to regulate cooperative social relationships). As human cooperation scaled up in complexity, cooperative communication and social normativity scaled up as well, leading to the development of culturally elaborated forms of language and morality. Language facilitates all aspects of morality and is even necessary for certain aspects. Humans use language to (1) initiate, (2) preserve, (3) revise, and (4) act on morality in ways such as forming joint commitments, teaching norms, modifying social realities, and engaging in moral reason-giving.