During the same period, Lukács developed a close connection to Max and Marianne Weber in Heidelberg, to Ernst Bloch and to the Neo-Kantian philosophers Heinrich Rickert and Emil Lask. Between 1912 and 1914 he worked on a first attempt to formulate a systematic approach to art, which remained unpublished during his lifetime (GW 16). After the beginning of the First World War, Lukács was exempted from the frontline of military service. In 1914, he married the Russian political activist (and convicted terrorist) Jelena Grabenko.