Halfway between the publication of Széchenyi's Credit (Hitel, 1830) and the revolutionary year 1848, the Diet of 1839-40 stands out as an interesting episode of the Hungarian Reform Age. The importance of this period is generally recognized, but its interpretation is still problematic. Pre-World War I liberal historiographers tended to blame the "government of Vienna" for all the blunders committed before 1848. The conservative Szekfű school, more charitable to Metternich and Austria, was no less nationalistic in its approach to the non-Magyar minorities of Hungary, maintaining the myth of Magyar "spiritual supremacy" between the two world wars. Today, Marxist Hungarian historians try to be fair in their writings about the nationality problem but frown upon analyses of Austro-Hungarian cooperation, considering them apologies for the Habsburg Gesamtmonarchie. Modern Western historians, too, differ in their evaluation of nineteenth-century Hungarian reform and its leaders.