Semantic Presuppositions in Political Personhood: The Case of Discourse-Theoretic Rationality and Social Externalism

Questions about the mind and those about politics have conventionally found separate treatments in the philosophical literature. This paper proposes that crucial assumptions about the nature of the human person in politics actually turn on a compatible account of mental content. The particular relation that I will focus on here would be one between a discourse-theoretic model of persons in political ontology and social externalism in philosophy of mind. For the former, I’ll concern myself largely with Philip Pettit’s presentation of it and its expression in terms of intentional systems which, I’ll argue, renders itself to a version of social externalism that emerges out of Wittgenstein’s Philosophical Investigations. An auxiliary consequence of this exercise is the diagnosis of a familiar problem that is associated with the notion of rule-following—I’ll argue that skepticism about rule-following is only tenable when one holds on to an internalist thesis about the individuation of mental content. This objection is dissolved once a theory of understanding is adopted which works with a distinctly externalist account of mental content. Finally, I will take stock of the implications of this exercise in terms of suggesting basic grounds for a philosophically interesting relationship between political ontology and philosophy of mind.