1. History of Social Epistemology
The phrase "social epistemology" does not have a long history of systematic use. It is not difficult, however, to find historical philosophers who made at least brief forays into the social dimensions of knowledge or rational belief. In his dialogue Charmides, Plato posed the question of how a layperson can determine whether someone who purports to be an expert in an area really is one. Since dependence on experts or authorities is a problem within the scope of social epistemology, this was a mini-exploration of the subject. The seventeenth and eighteenth century British philosophers John Locke, David Hume, and Thomas Reid devoted portions of their epistemologies — often just scattered remarks — to the problem of "testimony": When should cognitive agents rely on the opinions and reports of others? What must a hearer know about a speaker to be entitled to trust his assertions? Locke so emphasized the importance of intellectual self-reliance that he expressed strong doubts about giving authority to the opinions of others (1959, I. iii. 23). Hume took it for granted that we regularly rely on the factual statements of others, but insisted that it is reasonable to do so only to the extent that we have adequate reasons for thinking that these sources are reliable. Hume's empiricism led him to require that these reasons be based on personal observations that establish the veracity of human testimony (Hume 1975, X, 111). Reid, by contrast, claimed that our natural attitude of trusting others is reasonable even if we know little if anything about their reliability. Testimony, at least sincere testimony, is always prima facie credible (Reid 1975, VI, xxiv). All of these positions, of course, are epistemological positions. However, they were generally part of an epistemological enterprise that was basically egocentric in orientation, so they are perhaps not ideal or pure paradigms of social epistemology. Nonetheless, they are clear examples of early epistemologies that examined social dimensions of epistemic justification.
A different tradition focused on aspects of knowledge that are "social" in a more sociological or political sense, though members of this tradition less frequently aligned their work to core issues in epistemology. Karl Marx's theory of ideology could well be considered a type of social epistemology. On one interpretation of Marx's conception of "ideology", an ideology is a set of beliefs, a world-view, or a form of consciousness that is in some fashion false or delusive. The cause of these beliefs, and perhaps of their delusiveness, is the social situation and interests of the believers. Since the theory of ideology, so described, is concerned with the truth and falsity of beliefs, it might even be considered a form of classical social epistemology.
Karl Mannheim (1936) extended Marx's theory of ideology into a sociology of knowledge. He classed forms of consciousness as ideological when the thoughts of a social group can be traced to the group's social situation or "life conditions" (1936: 78). The descriptive enterprise of tracing these thoughts to the social situation might be construed as social epistemology. The further enterprise of critiquing and dissolving ideological delusions — "Ideologiekritik" — is surely a form of social epistemology. The critical theory of the Frankfurt School was one attempt, or a family of attempts, to develop this idea. Critical theory aims at emancipation and enlightenment by making agents aware of hidden coercion in their environment, enabling them to determine where their true interests lie (Geuss 1981: 54). In a variant of critical theory, Jurgen Habermas introduced the idea of an "ideal speech situation", a hypothetical situation of absolutely uncoerced and unlimited discussion between completely free and equal human agents (Habermas 1973; Geuss 1981: 65). In some writings Habermas uses the ideal speech situation as a transcendental criterion of truth. Beliefs that agents would agree upon in the ideal speech situation are ipso facto true beliefs (Habermas and Luhmann 1971: 139, 224). Here a social communicational device is treated as a type of epistemic standard.
Subsequent developments in the sociology of knowledge, and especially in the sociology of science, can also be considered forms of social epistemology. Since science is widely considered the paradigmatic knowledge-producing enterprise, and since epistemology is centrally concerned with knowledge, any endeavor that seeks to identify social determinants of science might plausibly be categorized as a form of social epistemology. Both Mannheim and the sociologist of science Robert Merton (1973) exempted (natural) science from the influence of societal or "existential" factors of the types that influence other categories of beliefs. Science was viewed as a society unto itself, largely autonomous from the rest of society. But later sociologists of science have declined to offer the same exemption. The Edinburgh School contends that all scientific beliefs are on a par with other beliefs in terms of their causes. Barry Barnes and David Bloor formulated a "symmetry" or "equivalence" postulate, according to which all beliefs are on a par with respect to the causes of their credibility (1982). Many historical caase studies conducted in this tradition have tried to show how scientists too are swayed by class interests, political interests, and other factors usually considered "external" to pure science (Forman 1971; Shapin 1975; Mackenzie 1981). Thomas Kuhn (1962/1970) is thought to have shown that purely objective considerations can never settle disputes between competing scientific theories or paradigms, and hence scientific beliefs must be influenced by "social factors". Kuhn's descriptions of the practices of scientific research communities, especially descriptions of the inculcation and preservation of paradigms during periods of "normal" science, were clear and influential examples of a social analysis of science, especially when contrasted with the positivist tradition of analysis. Michel Foucault developed a radically political view of knowledge and science, arguing that practices of so-called knowledge-seeking, especially in the modern world, really serve the aims of power and social domination (1977, 1980). All of these writers may be considered "social epistemologists", although they themselves do not employ this phrase.
Perhaps the first use of the phrase "social epistemology" appears in the writings of a library scientist, Jesse Shera, who in turn credits his associate Margaret Egan. "[S]ocial epistemology," says Shera, "is the study of knowledge in society…. The focus of this discipline should be upon the production, flow, integration, and consumption of all forms of communicated thought throughout the entire social fabric" (1970: 86). Shera was particularly interested in the affinity between social epistemology and librarianship. He did not, however, construct a conception of social epistemology with very definite philosophical or social-scientific contours. What might such contours be?