Plato, Laws 714c

ὅλην βλέπειν δεῖν φασι τοὺς νόμους, ἀλλʼ ἥτις ἂν καθεστηκυῖα ᾖ πολιτεία, ταύτῃ ἰδεῖν τὸ συμφέρον, ὅπως ἄρξει τε ἀεὶ καὶ μὴ καταλυθήσεται, καὶ τὸν φύσει ὅρον τοῦ δικαίου λέγεσθαι κάλλισθʼ οὕτω. πῶς; ὅτι τὸ τοῦ κρείττονος συμφέρον ἐστίν. λέγʼ ἔτι σαφέστερον. ὧδε. τίθεται δήπου, φασίν, τοὺς νόμους ἐν τῇ πόλει ἑκάστοτε τὸ κρατοῦν. ἦ γάρ; ἀληθῆ λέγεις.

that the laws ought not to aim either at war or at goodness in general, but ought to have regard to the benefit of the established polity, whatever it may be, so that it may keep in power forever and never be dissolved; and that the natural definition of justice is best stated in this way. In what way? That justice is what benefits the stronger.. Explain yourself more clearly. This is how it is:—the laws (they say) in a State are always enacted by the stronger power? Is it not so? That is quite true. Do you suppose, then (so they argue), that a democracy