A broad historical paradigm in both sociology and anthropology, functionalism addresses the social structure as a whole and in terms of the necessary function of its constituent elements. A common analogy (popularized by Herbert Spencer) is to regard norms and institutions as 'organs' that work toward the proper-functioning of the entire 'body' of society. The perspective was implicit in the original sociological positivism of Comte, but was theorized in full by Durkheim, again with respect to observable, structural laws. Functionalism also has an anthropological basis in the work of theorists such as Marcel Mauss, Bronisław Malinowski and Radcliffe-Brown. It is in Radcliffe-Brown's specific usage that the prefix 'structural' emerged. Classical functionalist theory is generally united by its tendency towards biological analogy and notions of social evolutionism. As Giddens states: "Functionalist thought, from Comte onwards, has looked particularly towards biology as the science providing the closest and most compatible model for social science. Biology has been taken to provide a guide to conceptualizing the structure and the function of social systems and to analyzing processes of evolution via mechanisms of adaptation ... functionalism strongly emphasizes the pre-eminence of the social world over its individual parts (i.e. its constituent actors, human subjects)."