The present article aims to reconstruct some political consequences of aristippean philosophy in the light of fragment fs, 570 (= ssr, iv.a.163 = Memorabilia, ii.1.1–17) in order to show how Aristippus’ agreement with Socrates’ remarks fits the Cyrus composed by Xenophon in his Cyropaedia. In pursuance of this, I will review Aristippus’ ethics and will show how, despite the opposition with his hedonistic principles for a pleasureable life, Aristippus accepts that a good ruler needs to be a enkratic one—althouth he (...) argues that pursuing any rule is senselessness. After showing how it is possible to recognice some hedonistic position in Adeimantus’ question at the beginning of Republic, iv, I will present the enkratic character of Cyrus. Finally, I will conclude pointing out the political continuities between Aristippus’ acceptance in fs, 570 and the ideal of ruler constructed by Xenophon. (shrink)