Plato, Laws 715a

αὐτῶν τοῦτο, καὶ ἔφαμέν που κατὰ φύσιν τὸν Πίνδαρον ἄγειν δικαιοῦντα τὸ βιαιότατον, ὡς φάναι. ναί, ταῦτʼ ἦν ἃ τότε ἐλέχθη. σκόπει δὴ ποτέροις τισὶν ἡ πόλις ἡμῖν ἐστιν παραδοτέα. γέγονεν γὰρ δὴ μυριάκις ἤδη τὸ τοιοῦτον ἔν τισι πόλεσιν. τὸ ποῖον; ἀρχῶν περιμαχήτων γενομένων, οἱ νικήσαντες τά τε πράγματα κατὰ τὴν πόλιν οὕτως ἐσφετέρισαν σφόδρα, ὥστε ἀρχῆς μηδʼ ὁτιοῦν μεταδιδόναι τοῖς ἡττηθεῖσιν, μήτε αὐτοῖς μήτε ἐκγόνοις, παραφυλάττοντες δὲ ἀλλήλους ζῶσιν,

when it justifies the right of might. Yes, that is what was said then. Consider now, to which class of men should we entrust our State. For the condition referred to is one that has already occurred in States thousands of times. What condition? Where offices of rule are open to contest, the victors in the contest monopolize power in the State so completely that they offer not the smallest share in office to the vanquished party or their descendants; and each party keeps a watchful eye on the other,