Plato, Laws 701e

τούτων ἕνεκα δὴ πολιτείας τήν τε δεσποτικωτάτην προελόμενοι καὶ τὴν ἐλευθερικωτάτην, ἐπισκοποῦμεν νυνὶ ποτέρα τούτων ὀρθῶς πολιτεύεται· λαβόντες δὲ αὐτῶν ἑκατέρας μετριότητά τινα, τῶν μὲν τοῦ δεσπόζειν, τῶν δὲ τοῦ ἐλευθεριάσαι, κατείδομεν ὅτι τότε διαφερόντως ἐν αὐταῖς ἐγένετο εὐπραγία, ἐπὶ δὲ τὸ ἄκρον ἀγαγόντων ἑκατέρων, τῶν μὲν δουλείας, τῶν δὲ τοὐναντίου, οὐ συνήνεγκεν οὔτε τοῖς οὔτε τοῖς.

With these objects in view, we selected the most despotic of polities and the most absolutely free, and are now enquiring which of these is rightly constituted. When we took a moderate example of each—of despotic rule on the one hand, and liberty on the other,—we observed that there they enjoyed prosperity in the highest degree but when they advanced, the one to the extreme of slavery, the other to the extreme of liberty, then there was no gain to either the one or the other.