Plato, Laws 677c

θῶμεν δὴ τὰς ἐν τοῖς πεδίοις πόλεις καὶ πρὸς θαλάττῃ κατοικούσας ἄρδην ἐν τῷ τότε χρόνῳ διαφθείρεσθαι; θῶμεν. οὐκοῦν ὄργανά τε πάντα ἀπόλλυσθαι, καὶ εἴ τι τέχνης ἦν ἐχόμενον σπουδαίως ηὑρημένον ἢ πολιτικῆς ἢ καὶ σοφίας τινὸς ἑτέρας, πάντα ἔρρειν ταῦτα ἐν τῷ τότε χρόνῳ φήσομεν; πῶς γὰρ ἄν, ὦ ἄριστε, εἴ γε ἔμενεν τάδε οὕτω τὸν πάντα χρόνον ὡς νῦν διακεκόσμηται, καινὸν ἀνηυρίσκετό ποτε καὶ ὁτιοῦν;

It is certainly probable. Shall we assume that the cities situated in the plains and near the sea were totally destroyed at the time? Let us assume it. And shall we say that all implements were lost, and that everything in the way of important arts or inventions that they may have had,—whether concerned with politics or other sciences,— perished at that time? For, supposing that things had remained all that time ordered just as they are now, how, my good sir, could anything new have ever been invented?