This paper explores the presence and consideration of economics in sociology, specifically its classical version. It identifies certain original and independent economic theories, concepts and approaches in classical sociological theory as central and its derivations, implications and extensions of economics as peripheral. The paper argues and demonstrates that classical sociology is far from being the science of noneconomic or irrational phenomena, as often sociologists conceive it and economists perceive it in counter-distinction from economics defined as the science of rational behavior, and indeed encompasses virtually all economic activities and processes, and thus prefigures New Economic Sociology adopting the same approach. [ABSTRACT FROM AUTHOR]