Expansion and Westernization
Muscovy continued its territorial growth through the seventeenth century. In the southwest, it acquired eastern Ukraine, which had been under Polish rule. The Ukrainian Cossacks, warriors organized in military formations, lived in the frontier areas bordering Poland, the Tatar lands, and Muscovy. Although they had served in the Polish army as mercenaries, the Ukrainian Cossacks remained fiercely independent and staged a number of uprisings against the Poles. In 1648 most of Ukrainian society joined the Cossacks in a revolt because of the political, social, religious, and ethnic oppression suffered under Polish rule. After the Ukrainians had thrown off Polish rule, they needed military help to maintain their position. In 1654 the Ukrainian leader, Bogdan Khmel'nitskiy (Bohdan Khmel'nyts'kyy), offered to place Ukraine under the protection of the Muscovite tsar, Aleksey I, rather than under the Polish king. Aleksey's acceptance of this offer, which was ratified in the Treaty of Pereyaslavl', led to a protracted war between Poland and Muscovy. The Treaty of Andrusovo, which ended the war in 1667, split Ukraine along the Dnepr River, reuniting the western sector with Poland and leaving the eastern sector self-governing under the suzerainty of the tsar.
In the east, Muscovy had obtained western Siberia in the sixteenth century. From this base, merchants, traders, and explorers pushed eastward from the Ob' River to the Yenisey River, then to the Lena River. By the middle of the seventeenth century, Muscovites had reached the Amur River and the outskirts of the Chinese Empire. After a period of conflict with the Manchu Dynasty, Muscovy made peace with China in 1689. By the Treaty of Nerchinsk, Muscovy ceded its claims to the Amur Valley, but it gained access to the region east of Lake Baikal and the trade route to Beijing. Peace with China consolidated the initial breakthrough to the Pacific that had been made in the middle of the century.
Muscovy's southwestern expansion, particularly its incorporation of eastern Ukraine, had unintended consequences. Most Ukrainians were Orthodox, but their close contact with the Roman Catholic Polish Counter-Reformation also brought them Western intellectual currents. Through Kiev, Muscovy gained links to Polish and Central European influences and to the wider Orthodox world. Although the Ukrainian link stimulated creativity in many areas, it also undermined traditional Russian religious practices and culture. The Russian Orthodox Church discovered that its isolation from Constantinople had caused variations to creep into its liturgical books and practices. The Russian Orthodox patriarch, Nikon, was determined to bring the Russian texts back into conformity with the Greek originals. But Nikon encountered fierce opposition among the many Russians who viewed the corrections as improper foreign intrusions, or perhaps the work of the devil. When the Orthodox Church forced Nikon's reforms, a schism resulted in 1667. Those who did not accept the reforms came to be called the Old Believers (starovery
); they were officially pronounced heretics and were persecuted by the church and the state. The chief opposition figure, the archpriest Avvakum, was burned at the stake. The split subsequently became permanent, and many merchants and peasants joined the Old Believers.
The tsar's court also felt the impact of Ukraine and the West. Kiev was a major transmitter of new ideas and insight through the famed scholarly academy that Metropolitan Mogila (Mohyla) founded there in 1631. Among the results of this infusion of ideas into Muscovy were baroque architecture, literature, and icon painting. Other more direct channels to the West opened as international trade increased and more foreigners came to Muscovy. The tsar's court was interested in the West's more advanced technology, particularly when military applications were involved. By the end of the seventeenth century, Ukrainian, Polish, and West European penetration had undermined the Muscovite cultural synthesis--at least among the elite--and had prepared the way for an even more radical transformation.