The printed life work of a founder of German sociology is made accessible to international research and teaching through this complete edition. The Ferdinand Tonnies Gesamtausgabe / TG is projected at 24 volumes. In the 9th volume of the TG, monographs, writings and reviews by Ferdinand Tonnies are edited from the following areas: general political writings; writings on the World War I; statistical writings; sociological and national-economic writings; historical writings; philosophical writings; writings on the politics of economics and society; writings on the politics of culture and education; writings on race and racism; and remarks by Tonnies on individual persons.