1) Sociologists such as Durkheim, Marx, Berger, and Luckmann study how knowledge and reality are socially constructed through institutions and collective representations. 2) Knowledge is embedded in and distributed throughout society, with certain beliefs becoming taken for granted as "what everybody knows." 3) Thinkers like Foucault and Mannheim examine how knowledge and power are intertwined, with ideologies serving to maintain the power of ruling classes by appearing neutral and objective while still being socially constructed.