ABSTRACT
Social psychology will soon celebrate its centenary. It all began in 1908 when the first two textbooks in the field were published: One by the psychologist William McDougall and one by the sociologist E. A. Ross (McDougall, 1908; Ross, 1908). Hence, right from the outset, the new discipline of social psychology was established to combine micro-psychological and macro-sociological conceptual frameworks and methodologies. Many believed that this was a promising development, which would bring a fresh psychological perspective to the social sciences by opening psychology up to a new range of problems faced by human beings insofar as they are members of collectives (see Cartwright, 1979).
