Influenced by the Russian anarchist Peter Kropotkin, Migge's communal, grass-roots socialism led to his involvement with the Siedlungswesen movement after the First World War. In 1920, with architect Martin Wagner, Migge founded the "Stadtland-Kulturgesellschaft Gross-Hamburg und Gross-Berlin" for the instigation of a new policy for settlement of the land. Migge was technical and totally urban, seeing the expansion of industrial cities as inevitable. During the 1920s, Migge adhered to a pragmatic, socially meaningful Functionalism, at odds with the ideological, aesthetic Functionalism that was a tenet of the burgeoning International Style. His plantings and park designs were disciplined and architectonic. Yet his characteristic use of the "Trampelpfade" (paths trampled randomly over time by users) in his parks belies the rigidity of many of his designs. He also emphasized the relation of plant material to technology—the "“Wesen der Pflanze”" (the character of plants) over their purely aesthetic use.