Although influential in philosophy and relevant to international political theory’s (IPT) key concerns, Donald Davidson has not received commensurate attention in IPT. I aim here to commence filling this gap. I explore Davidson’s insights which fruitfully challenge established disciplinary views. The notions of rationality, objectivity and truth, and, on the other hand, those of intersubjectivity, language and interpretation are often needlessly separated and constricted by seemingly alternative approaches. Davidson firmly reconnects these notions. He helps rethink the realist, strong post-positivist, but (...) also liberal, ‘thin’ constructivist and critical (not thoroughly contextualist) approaches. He bridges the normative cosmopolitan–communitarian distinction. Eventually, Davidson laid foundations for a perspective foregrounding possibilities for rational communication and agreement between very different contexts and also for the non-dogmatic, pluralist and dynamic nature of communication itself. (shrink)