 From 1960 onwards he was based in the United States, primarily at Northwestern University in Evanston, Illinois, where he was initially Professor of German, and subsequently Avalon Professor of the Humanities until his retirement in 1979.For Heller, German letters as an academic discipline was something of an avocation, a marriage of convenience to supply a vehicle for the conveyance of thought of a wider scope.He kept a certain distance from the scholarly community around him, believing (with Jacob Burckhardt) this community's pedantry and unremitting quest for precision to be 'one of the most cunning enemies of truth', their cumulative effect being 'the absence of true comprehension'.