Karl Manheim (1893-1947) is an outstanding German philosopher and sociologist, one of the founders of the sociology of knowledge. The main circle of research is related to the sociology of knowledge and the theory of ideology; in recent years, he has intensively dealt with the problems of upbringing and education, changes taking place in the culture and social life of the 20th century. This publication includes his main works: "Ideology and Utopia," "Man and Society in the Era of Transformation," "Diagnosis of Our Time," etc.