This article is the final one, the second part of the study devoted to the analysis of the economic history of the USSR in the initial period of the Great Patriotic War (1941–1942). The author considers the aspects of economic development not discussed in the first part of the article. The greatest place is occupied by the analysis of the standard of living of the population in its various aspects. Numerous sources are used, including statistical collections of the war years, survey guides and memoirs of contemporaries. In addition to the current consumption of goods, the consumption of services and living conditions of the population are also considered. The author analyzes the role of Lend-Lease economy in the USSR in detail. Supplies under the Lend-Lease program are considered not only for this period, but throughout the war. The analysis is carried out for individual product groups. It is shown that, contrary to the prevailing ideas in literature about the insignificance of the share of supplies under the Lend-Lease program, based on their estimates in value terms, especially in many key areas, the role of these supplies in the economy of the USSR during the war was enormous. The state of science and higher education during the turning point of the war is examined. It is shown that they were preserved and played an important role in improving the qualifications of personnel and the quality of military equipment. Particular attention is paid to the initial stage of research on atomic weapons. It is shown that despite limited resources, already in the most difficult period of the war in the USSR, research on the creation of nuclear weapons began.