Philip Lake, Albert Houtum-Schindler, Eduard Meyer, Karl F. Geldner and Karl H. Ethé, 1911 Encyclopædia Britannica (1911)
“ Not strong enough to break up the nobility, with its great estates, they were forced to utilize its services and still further to promote its interests; while their dependence on its good-will and assistance led inevitably to incessant gifts of money, lands and men. This state of affairs had also prevailed under the later Achaemenids, and had materially contributed to the disintegration of the empire and the numerous insurrections of the satraps. ”
