The Book That Launched the German Historical School of Jurisprudence. Written in the wake of the Napoleonic Wars and the Congress of Vienna, the Vocation proposed a common legal code for the newly liberated German states and attacked Thibaut"s advocacy of a code based on natural law. Though he aimed in part to improve the administration of justice, Savigny hoped that a common legal system would promote a larger goal: a spirit of unity among Germans. Originally published: London: Littlewood, [1831]. ix, [9]-192 pp.