Plato, Laws 680b

δοκοῦσί μοι πάντες τὴν ἐν τούτῳ τῷ χρόνῳ πολιτείαν δυναστείαν καλεῖν, ἣ καὶ νῦν ἔτι πολλαχοῦ καὶ ἐν Ἕλλησι καὶ κατὰ βαρβάρους ἐστίν· λέγει δʼ αὐτήν που καὶ Ὅμηρος γεγονέναι περὶ τὴν τῶν Κυκλώπων οἴκησιν, εἰπὼν— τοῖσιν δʼ οὔτʼ ἀγοραὶ βουληφόροι οὔτε θέμιστες, ἀλλʼ οἵ γʼ ὑψηλῶν ὀρέων ναίουσι κάρηνα ἐν σπέσσι γλαφυροῖσι, θεμιστεύει δὲ ἕκαστος

Everybody, I believe, gives the name of headship to the government which then existed,—and it still continues to exist to-day among both Greeks and barbarians in many quarters. And, of course, Homer mentions its existence in connection with the household system of the Cyclopes, where he says— No halls of council and no laws are theirs, But within hollow caves on mountain heights Aloft they dwell, each making his own law.