The book describes the socio-economic development of Ukraine as an integral part of Russia, shows the aggravation of class contradictions, highlights the events associated with the revolution of 1905-1907. periods of reaction and a new revolutionary upsurge, the First World War and the February bourgeois-democratic revolution. The position of Western Ukrainian lands, the struggle of workers for social and national liberation, for reunification with Ukraine within Russia is shown . The Role and Significance of the Leninist Party in the Development of the Revolutionary Movement of the Working People, the International Cohesion of the Russian and Ukrainian Proletarians . Reflected the state and development of culture in Ukraine.