Talcott Parsons was an American sociologist who developed structural functionalism, which views society as a system of interconnected parts that work together to maintain stability and social order. Parsons was influenced by theorists like Durkheim, Weber, Spencer, and Comte. He developed theories of social action, the social system, AGIL functions, and pattern variables. Parsons viewed society as made up of interdependent institutions that help society adapt, attain goals, integrate, and maintain social order. He believed rapid social change could disrupt this equilibrium.