Διότι δὲ πολιτικὸν ὁ ἄνθρωπος ζῷον πάσης μελίττης καὶ παντὸς ἀγελαίου ζῴου μᾶλλον, δῆλον. οὐθὲν γάρ, ὡς φαμέν, μάτην ἡ φύσις ποιεῖ· λόγον δὲ μόνον ἄνθρωπος ἔχει τῶν ζῴων· ἡ μὲν οὖν φωνὴ τοῦ λυπηροῦ καὶ ἡδέος ἐστὶ σημεῖον, διὸ καὶ τοῖς ἄλλοις ὑπάρχει ζῴοις (μέχρι γὰρ τούτου ἡ φύσις αὐτῶν ἐλήλυθε, τοῦ ἔχειν αἴσθησιν λυπηροῦ καὶ ἡδέος καὶ ταῦτα σημαίνειν ἀλλήλοις), ὁ δὲ λόγος ἐπὶ τῷ δηλοῦν ἐστι τὸ συμφέρον καὶ τὸ βλαβερόν, ὥστε καὶ τὸ δίκαιον καὶ τὸ ἄδικον· τοῦτο γὰρ πρὸς τὰ ἄλλα ζῷα τοῖς ἀνθρώποις ἴδιον, τὸ μόνον ἀγαθοῦ καὶ κακοῦ καὶ δικαίου καὶ ἀδίκου καὶ τῶν ἄλλων αἴσθησιν ἔχειν· ἡ δὲ τούτων κοινωνία ποιεῖ οἰκίαν καὶ πόλιν. καὶ πρότερον δὲ τῇ φύσει πόλις ἢ οἰκία καὶ ἕκαστος ἡμῶν ἐστιν. τὸ γὰρ ὅλον πρότερον ἀναγκαῖον εἶναι τοῦ μέρους· ἀναιρουμένου γὰρ τοῦ ὅλου οὐκ ἔσται ποὺς οὐδὲ χείρ, εἰ μὴ ὁμωνύμως, ὥσπερ εἴ τις λέγοι τὴν λιθίνην· διαφθαρεῖσα γὰρ ἔσται τοιαύτη, πάντα δὲ τῷ ἔργῳ ὥρισται καὶ τῇ δυνάμει, ὥστε μηκέτι τοιαῦτα ὄντα οὐ λεκτέον τὰ αὐτὰ εἶναι ἀλλ’ ὁμώνυμα. ὅτι μὲν οὖν ἡ πόλις καὶ φύσει πρότερον ἢ ἕκαστος, δῆλον· εἰ γὰρ μὴ αὐτάρκης ἕκαστος χωρισθείς, ὁμοίως τοῖς ἄλλοις μέρεσιν ἕξει πρὸς τὸ ὅλον, ὁ δὲ μὴ δυνάμενος κοινωνεῖν ἢ μηδὲν δεόμενος δι’ αὐτάρκειαν οὐθὲν μέρος πόλεως, ὥστε ἢ θηρίον ἢ θεός.
(Aristotle, Pol. 1253a7-28)
But obviously man is a political animal in a sense in which a bee is not, or any other gregarious animal. Nature, as we say, does nothing without some purpose; and she has endowed man alone among the animals with the power of speech. Speech is something different from voice, which is possessed by other animals also and used by them to express pain or pleasure; for their nature does indeed enable them not only to feel pleasure and pain but to communicate these feelings to each other. Speech, on the other hand serves to indicate what is useful and what is harmful, and so also what is just and what is unjust. For the real difference between man and other animals is that humans alone have perception of good and evil, just and unjust, etc. It is the sharing of a common view in these matters that makes a household and a state. Furthermore, the state has a natural priority over the household and over any individual among us. For the whole must be prior to the part. Separate hand or foot from the whole body, and they will no longer be hand or foot except in name, as one might speak of a ‘hand’ or ‘foot’ sculptured in stone. That will be the condition of the spoilt hand, which no longer has the capacity and the function which define it. So, though we may say they have the same names, we cannot say that they are, in that condition, the same things. It is clear then that the state is both natural and prior to the individual. For if an individual is not fully self-sufficient after separation, he will stand in the same relationship to the whole as the parts in the other case do. Whatever is incapable of participating in the association which we call the state, a dumb animal for example, and equally whatever is perfectly self-sufficient and has no need to (e.g. a god), is not a part of the state at all. (tr. Thomas Alan Sinclair, revised by Trevor J. Saunders)