 The post-war German historian Reinhart Koselleck made important contributions to the philosophy of history that are largely independent from the other sources of Continental philosophy of history mentioned here. (Koselleck’s contributions are ably discussed in Olsen 2012.) Koselleck contributed to a “conceptual and critical theory of history” (2002, 2004). His major compendium, with Brunner and Conze, of the history of concepts of history in the German-speaking world is one of the major expressions of this work (Brunner, Conze, and Koselleck 1972-97). Koselleck believes there are three key tasks for the metahistorian or philosopher: to identify the concepts that are either possible or necessary in characterizing history; to locate those concepts within the context of the social and political discourses and conflicts of the time period; and to critically evaluate various of these concepts for their usefulness in historical analysis.