The main goal of this paper is problematization of idea of historism  through the ideas of Karl Mannheim (especially on the ideology and vision of the world). The paper raises the question of how Mannheim view conditions and opportunities of historical knowledge and how the ideas of the historicism affect his philosophical and sociological concepts. Mannheim was trying to "sociologizing" philosophy of history offering a single, yet unfinished sketch of dynamic sociology of knowledge. His vision of the history of philosophy as "a dynamic metaphysics" indicates the division of his sociology of knowledge – the philosophical reflections of reality and sociological understanding of the socio-historical events.