Aristotle found support for his thesis in facts drawn from geopolitics or ‘natural law’. Greek superiority had to be proved demonstrably innate, a gift of nature. In one celebrated fragment he counsels Alexander to be ‘a hegemon [leader] of Greeks and a despot to the barbarians, to look after the former as after friends and relatives, and to deal with the latter as with beasts or plants’.
Alexander of Macedon, 356-323 B.C.: A Historical Biography, page 58
Macedonia as a whole tended to remain in isolation from the rest of Greece...Peter Green
In less than four years he had transformed Macedonia from a backward and primitive kingdom to one of the most powerful states in the Greek world.Peter Green