Ferdinand Tönnies (German: ['tœni?s]; Oldwenswort, 26 July 1855 – Kiel, 9 April 1936 ) was a German sociologist, economist and philosopher.
He was a major contributor to sociological theory and field studies, best known for his distinction between two types of social groups, Gemeinschaft and Gesellschaft (Community and Society).
He co-founded the German Society for Sociology alongside Max Weber and Georg Simmel and many other founders.
He was president of the society from 1909 to 1934, after which he was ousted for having criticized the Nazis.
Tönnies was considered the first German sociologist proper, published over 900 works and contributed to many areas of sociology and philosophy.