Now that Russia was becoming a modern state, it required more money to govern her. Civilization is costly, and the revenues must not be fluctuating. Boris saw they could only be made sure by attaching to the soil the peasant, whose labor was at the foundation of the prosperity of the state. It was the peasant who bore the weight of an expanded civilization which he did not share! The visitor at Moscow to-day may see in the Kremlin a wonderful tower, 270 feet high, which was erected in honor of Ivan the Great by the usurper Boris; but the monument which keeps his memory alive is the more stupendous one of--Serfdom. The expected increase in prosperity from the new system did not immediately come. The revenues were less than before. Bands of fugitive serfs were fleeing from their masters and joining the community of free Cossacks on the Don. Lands were untilled, there was misery, and at last there was famine, and then discontent and demoralization extending to the upper classes, and a diminished income which finally bore upon the Tsar himself. Suddenly there came a rumor that Dmitri, the infant son of Ivan the Terrible, was not dead! He was living in Poland, and with incontestable proofs of his identity was coming to claim his own. In 1604 he crossed the frontier, and thousands of discontented people flocked to his standard with wild enthusiasm. Boris had died just before Dmitri reached Moscow. He entered the city, and the infatuated people placed in his hand and upon his head the scepter and the crown of Ivan IV.; and after making sure that the wife and the son of Boris Godunof were strangled, this amazing Pretender commenced his reign. An extraordinary thing had happened. A nameless adventurer and impostor had been received with tears of joy as the son of Ivan and of St. Vladimir, the seventh wife of Ivan the Terrible even recognizing and embracing him as her son! But Dmitri had not the wisdom to keep what his cunning had won. His Polish wife came, followed by a suite of Polish Catholics, who began to carry things with a high hand. The clergy was offended and soon enraged. In five years Dmitri was assassinated, and his mutilated corpse was lying in the palace at the Kremlin, an object of insult and derision; and then, for Russia there came another chaos. For a brief period Vasili Shuiski, head of one of the princely families, reigned, while two more "false Dmitris" appeared, one from Sweden and the other from Poland. The cause of the latter was upheld by the King of Poland, with the ulterior purpose of bringing the disordered state of Russia under the Polish crown, and making one great Slav kingdom with its center at Cracow.