Jan Tschichold and Swiss Typography

Who or what was their main influences? Were they reacting to something happening at the time?

Tschichold was influenced by Soviet Constructivism, especially the work of designer El Lissitzky and the Bauhaus exhibition and went on to create and publish the books ‘ Elementary Typography’ in 1925 and ‘The New Typography’ in 1928 which was greatly influenced by the modernist movement. These then both promoted the functional San-serif typeface and were both read among young designers.