Through a well-cited survey of sociological theory, Randall Collins (1994) retroactively labels various theorists as belonging to four theoretical traditions: functionalism, conflict, symbolic interactionism, and utilitarianism. While modern sociological theory descends predominately from functionalist (Durkheim) and conflict-oriented (Marx and Weber) perspectives of social structure, it also takes great influence from the symbolic interactionist tradition, accounting for theories of pragmatism (Mead, Cooley) and micro-level structure (Simmel). Likewise, utilitarianism (aka "rational choice" or "social exchange"), although often associated with economics, is an established tradition within sociological theory. Lastly, as argued by Raewyn Connell (2007), a tradition that is often forgotten is that of social Darwinism, which applies the logic of biological evolution to the social world. This tradition often aligns with classical functionalism and is associated with several founders of sociology, primarily Herbert Spencer, Lester F. Ward and William Graham Sumner. Contemporary sociological theory retains traces of each of these traditions, which are by no means mutually exclusive. Structural functionalism A broad historical paradigm in sociology, structural functionalism addresses social structures in its entirety and in terms of the necessary functions possessed by its constituent elements. A common parallel used by functionalists, known as the organic or biological 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 Auguste 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 Alfred Radcliffe-Brown, the latter of whom, through explicit usage, introduced the "structural" prefix to the concept. Classical functionalist theory is generally united by its tendency towards the 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)." Conflict theory Conflict theory is a method that attempts, in a scientific manner, to provide causal explanations to the existence of conflict in society. Thus, conflict theorists look at the