Abstract
The article is devoted to the analysis of the role and contribution to the domestic sociological science of one of its largest representatives of the second half of the XX century, L.N. Kogan, in connection with the centenary of his birth. A brief biographical sketch of Kogan, an analysis of the process of his formation and development as a sociologist – theorist and empiricist is offered. Some problems of theoretical sociology in the work of the scientist are considered. A general description of the empirical studies conducted under his leadership is given. The final section of the article is devoted to the analysis of the content of L.N.'s activity. Kogan as the founder and head of the Ural Sociological School.