This volume is dedicated to the creative heritage of Pitirim Alexandrovich Sorokin. The authors comprehend its sociological, historical, scientific and philosophical-methodological ideas, which today acquire special relevance for the social and humanitarian sciences. Historical and biographical studies and memoirs of contemporaries are also presented. The book is addressed to a wide range of readers - professional sociologists and philosophers, students and graduate students, everyone who is interested in the problems of socio-philosophical thought.