Hannes Meyer, director of the Bauhaus de Dessau from 1928 to 1930, was an architect-urbanist-professor whose professional and vital career, of clearly defined phases and stages, was marked by the rejection of the architecture of art and the search for a cooperative architecture , of non-author, socially and politically engaged. A commitment and a search that led him to change places and countries in the wake of the hectic decades of interwar, postwar and revolutions that marked the first half of the twentieth century. The progressive elements of Switzerland, the Germany of the Weimar Republic, the Stalinist USSR, the Swiss neutral, the post-revolutionary Mexico of President Cárdenas, the difficult post-war Europe and again the neutral Switzerland were the scenarios in which he sought and struggled to conceive and defend an architecture born from the functional-constructive, cooperative, truthful, committed to its time and circumstances. Chance probably played a role, as in everything, but it was his theoretical convictions, his rationalist functional conviction and the solidity of his social and political commitment that permeated continuity in the apparent bursts.