Even in the Oath of Alexander the Great (324 BC), it is stated that: ”Unlike the narrow minded, I make no distinction between Greeks and Barbarians. The origin of citizens, or the race into which they were born, is of no concern to me. I have only one criterion by which to distinguish them. Virtue.
For me, any good foreigner is a Greek and any bad Greek is worse than a Barbarian”. The word Barbarian had a different meaning that to-day and was then referred to people speaking a language that Greeks could not understand, as it sounded “bar-bar”.