Plato, Laws 677b

ὡς οἱ τότε περιφυγόντες τὴν φθορὰν σχεδὸν ὄρειοί τινες ἂν εἶεν νομῆς, ἐν κορυφαῖς που σμικρὰ ζώπυρα τοῦ τῶν ἀνθρώπων διασεσωμένα γένους. δῆλον. καὶ δὴ τοὺς τοιούτους γε ἀνάγκη που τῶν ἄλλων ἀπείρους εἶναι τεχνῶν καὶ τῶν ἐν τοῖς ἄστεσι πρὸς ἀλλήλους μηχανῶν εἴς τε πλεονεξίας καὶ φιλονικίας καὶ ὁπόσʼ ἄλλα κακουργήματα πρὸς ἀλλήλους ἐπινοοῦσιν. εἰκὸς γοῦν.

That the men who then escaped destruction must have been mostly herdsmen of the hills, scanty embers of the human race preserved somewhere on the mountain-tops. Evidently. Moreover, men of this kind must necessarily have been unskilled in the arts generally, and especially in such contrivances as men use against one another in cities for purposes of greed and rivalry and all the other villainies which they devise one against another.