This paper reviews historical and comparative theories in economic sociology that seek to explain substantial differences in economic behavior across time and space. In order to develop a more integrative analytical framework, one should avoid the stance of mainstream economics that states a force of self-interest determines economic behavior exogenously. The author challenges the idea of a universal economic system and shows that most sociologists share the view that a society's structural, political, and cultural features shape economic behavior. However, scholars have not reached a consensus on a predominant explanation: some researchers focus on the role of social networks, others on power relations, and still others on social institutions-conventions. Originally, comparative and historical inquiry viewed these perspectives as alternative frameworks, but recent studies refer to them as complementary. Using the reasoning of three major predecessors to economic sociology - Karl Marx, Max Weber, and Emile Durkheim - the author categorizes modern comparative research in economic sociology in accordance with their theoretical toolkit. Despite all the differences, these studies apply the same inductive method, implying that a single process cannot account for variety in economic behavior.