 All in all, Protagoras appears as one of the first supporters of a conventionalist notion of justice (Neschke-Hentschke 1995: 56–59; Bonazzi 2020: 67–68). Law and justice coincide: the just is what is established by law, which is the result of human decisions, a set of rules that men establish together. Interestingly, it is precisely this kind of conventionalist account of justice and the relation between nomos and the useful that will be objects of heated debates in the second half of the fifth century BCE, most notably among the sophists (see Antiphon 87B44 DK, significantly from a treatise entitled Truth, Xenophon, Memorabilia Book I, Ch. 40–46, Callicles in Plato’s Gorgias 483b–484b, Thrasymachus in Plato’s Republic 338c–339a, Thucydides History V 84–105).