Those who live in a cold climate and in [northern] Europe are full of spirit, but wanting in intelligence and skill; and therefore they keep their freedom, but have no political organization, and are incapable of ruling over others. Whereas the natives of Asia are intelligent and inventive, but they are wanting in spirit, and therefore they are always in a state of subjection and slavery. But the Hellenic race, which is situated between them, is likewise intermediate in character, being high-spirited and also intelligent. Hence it continues free, and is the best governed of any nation, and, if it could be formed into one state, would be able to rule the world.
Book VII, Ch. 7 1327.b Tr. Benjamian Jowett (1908) - Politics