The chapter is divided into two parts which treat respectively two periods of the development of Lukács's thought on science: his earlier conception as is expounded in History and Class Consciousness, and the later one outlined in The Specificity of Aesthetic. Although the theory of science presented here is radically diff erent from the theory we found in History and Class Consciousness, we can discern also a conservation and transformation of the contents of certain basic categories and thus a moment of continuity is preserved.