Plutarch lauds Demosthenes for not being of a fickle disposition. Rebutting historian Theopompus, the biographer insists that for "the same party and post in politics which he held from the beginning, to these he kept constant to the end; and was so far from leaving them while he lived, that he chose rather to forsake his life than his purpose". On the other hand, Polybius, a Greek historian of the Mediterranean world, was highly critical of Demosthenes' policies. Polybius accused him of having launched unjustified verbal attacks on great men of other cities, branding them unjustly as traitors to the Greeks. The historian maintains that Demosthenes measured everything by the interests of his own city, imagining that all the Greeks ought to have their eyes fixed upon Athens. According to Polybius, the only thing the Athenians eventually got by their opposition to Philip was the defeat at Chaeronea. "And had it not been for the King's magnanimity and regard for his own reputation, their misfortunes would have gone even further, thanks to the policy of Demosthenes".