The whole internal policy of Poland from the coronation of Yagello to the reign of Vladislav IV. was to assimilate the nobility of Lithuania and Russia to that of Poland in political rights and in religious profession. The success was complete in the political sense, and practically so in the religious. The Polish nobility, who were in fact the state, possessed at the time of Yagello's coronation all the land, and owned the labor of the people; later on they ceased to pay taxes of any kind. It was a great bribe to the nobles of Lithuania and Russia to occupy the same position. The Lithuanians became Catholics at the accession of Yagello, or soon after; but in Russia, where all belonged to the Orthodox Church, the process was slow, even if sure. The princes Ostrorog and Dominik Zaslavski of this book were of Russian families which held their faith for a long time. The parents of Prince Yeremi Vishnyevetski were Orthodox, and his mother on her death-bed implored him to be true to the faith of his ancestors. All had been done that could be done with the nobility; but the great mass of Russian people holding the same faith as the Russians of the East, whose capital was at Moscow, were not considered reliable; therefore a union of churches was effected, mainly through the formal initiative of the King Sigismond III. and a few ecclesiastics, but rejected by a great majority of the Russian clergy and people. This new or united church, which retained the Slav language with Eastern customs and liturgy, but recognized the supremacy of the Pope, was made the state church of Russia. From this rose all the religious trouble. The Russians, when Hmelnitski appeared, were in the following condition: Their land was gone; the power of life and death over them resided in lords, either Poles or Polonized Russians, who generally gave this power to agents or tenants, not infrequently Jews. All justice, all administration, all power belonged to the lord or to whomsoever he delegated his authority; there was no appeal. A people with an active communal government of their own in former times were now reduced to complete slavery. Such was the Russian complaint on the material side. On the moral side it was that their masters were filching their faith from them. Having stripped them of everything in this life, they were trying to deprive them of life to come.