with the assumption that the future belonged to West European scientific socialism, as created by material conditions of West European civilization." Lavrov recognized that Russia's historical development was significantly different from that of Western Europe, though he still maintained hope that Russia might join in the greater European socialist movement. In Lavrov's analysis of Russia's historical development, he concluded that the essence of Russia's peculiarity rested on the fact that they had not experienced feudalism and all of its progressive features. Russia had been isolated from European development by the Mongol conquest in the thirteenth century. In 1870, Lavrov published a comparison of the levels of economic, political and social development of several Western European nations and Russia, noting the relatively backward and poor condition of Russia. Despite Lavrov's historical analysis, he still believed a socialist revolution was possible in Russia. One of his contemporaries, Georgi Plekhanov, believed that a socialist revolution would only come with the development of a revolutionary workers’ party. In other words, he believed that Russia would have to wait for the same historical development experienced by the West. Lavrov rejected this outlook, believing it possible to create socialism by basing revolutionary tactics on Russia's individual history. Almost 90 percent of Russia's population were peasants, and there was also the intelligentsia: a unique bunch of people without any class affiliations, who, "unlike other elements of Russian society, were unflawed by the past." Thus, Lavrov felt that a true socialist revolution would have to integrate the rural population in order to succeed. Lavrov considered the intelligentsia the only portion of society capable of preparing Russia for participation in a worldwide socialist revolution. He gave them the task of compensating for the shortfalls of Russian historical development by organizing the people, teaching them scientific socialism, and finally, preparing to take up arms with the people when the time would come. Lavrov on Social Solidarity In his “Historical Letters” Lavrov accentuated the indissoluble connection between sociology as a science and basic principles of individual morality. According to him, sociological knowledge always depends upon scholars’ consciously chosen ideals. The majority of researchers stress the heterogeneity of Lavrov's ideas as well as the fact that a considerable impact was made upon him both by the leaders of the positivist tradition and by Karl Marx. All those impacts were in some way synthesized in Lavrov's idea of solidarity as the key issue