Ferdinand Tönnies was a German sociologist, economist, and philosopher. He was a significant contributor to sociological theory and field studies, best known for distinguishing between two types of social groups, Gemeinschaft and Gesellschaft. He co-founded the German Society for Sociology together with Max Weber and Georg Simmel and many other founders. He was president of the society from 1909 to 1933, after which he was ousted for having criticized the Nazis. Tönnies was regarded as the first...