Sophistic works of Antiphon different from Antiphon the Athenian
Antiphon the Sophist
A treatise known as On Truth, of which only fragments survive, is attributed to Antiphon the Sophist.  It is of great value to political theory, as it appears to be a precursor to natural rights theory.  The views expressed in it suggest its author could not be the same person as Antiphon of Rhamnus, since it was interpreted as affirming strong egalitarian and libertarian principles appropriate to a democracy—but antithetical to the oligarchical views of one who was instrumental in the anti-democratic coup of 411 like Antiphon of Rhamnus.  It's been argued that that interpretation has become obsolete in light of a new fragment of text from On Truth discovered in 1984.  New evidence supposedly rules out an egalitarian interpretation of the text.The following passages may confirm the strongly libertarian commitments of Antiphon the Sophist.