The main period of development of new territories of Western Siberia that located outside the borders of the Russian Empire falls on the period from the end of the 18th to the beginning of the 19th centuries. This is due to the Old Believers processes. It was found that the main reasons for the colonization of Western Siberia were: on the one hand, the resumption of repressive policies towards the Old Believers in Altai by the state and the official church, in connection with the transfer of the Kolyvan-Voskresensky factories under the control of the Cabinet; on the other hand, the creation of new dogmatics current of the Old Believers. The latter allowed the Old Believers to reconsider their attitude to historical events, power, and the sacraments of the church. Thus, in the study we identified three interrelated areas ofbespopov's thought: eschatology (the doctrine of the end of the world), ecclesiology (the doctrine of the church), soteriology (the doctrine of salvation). Having established that the confessional composition of the Old Believers, who were the founders of settlements in Western Siberia we came to the conclusion that the development of these territories took place for religious reasons.