Plato, Laws 640a

ἂν ἴσως εὐθύς γε γνοῖμεν τό τε ὀρθὸν καὶ μὴ γιγνόμενον ἐν αὐτοῖς. εἰκὸς λέγεις· ἀλλʼ ἐμοῦ φράζοντος πειρῶ μανθάνειν. τὸ μὲν γὰρ ἐν πάσαις τε συνόδοις, καὶ κοινωνίαις πράξεων ὡντινωνοῦν, ὡς ὀρθὸν πανταχοῦ ἑκάστοις ἄρχοντα εἶναι, μανθάνεις; πῶς γὰρ οὔ; καὶ μὴν ἐλέγομεν νυνδὴ μαχομένων ὡς ἀνδρεῖον δεῖ τὸν ἄρχοντʼ εἶναι. πῶς δʼ οὔ; ὁ μὴν ἀνδρεῖος τῶν δειλῶν ὑπὸ φόβων ἧττον τεθορύβηται.

even if we did come across them, we would probably fail to see at once what was right in them and what wrong. That is very probable. Try, however, to learn from my description. This you understand—that in all gatherings and associations for any purpose whatsoever it is right that each group should always have a commander. Of course. Moreover, we have recently said that the commander of fighting men must be courageous. Of course. The courageous man is less perturbed by alarms than the coward.