Darius had not spent the first years of his reign shoring up the empire for nothing; and he was resolved never again to see it threatened by collapse. With his habitual energy, he threw himself into the most overwhelming task of administration that any monarch had ever faced: nothing less than to set the world upon a sound financial footing. This was the same challenge that had destroyed both Cambyses and Bardiya; but Darius’ talents, once again, were to prove the equal of his ambition.