and the philosophy of law. And it has been argued that he derived both categories from Hobbes's concepts of "concord" and "union".

The second edition, published in 1912, of the work in which Tönnies further promoted the concepts turned out to be an unexpected but lasting success after the first edition was published in 1887 with the subtitle "Treatise on Communism and Socialism as Empirical Patterns of Culture". Seven more German editions followed, the last in 1935, and it became part of the