Throughout his life, Reinhart Koselleck has outlined his theory of historical knowledge in ever new attempts. History happens in time. But how? As progress in an ascending line? Or as a cycle in the eternal return of the same? Koselleck has added a third concept to these two familiar ideas: It is not history that repeats itself, but the conditions of possible histories. Only when we know what repeats itself do we recognise the surprisingly new: the crack in time.
On this occasion, the historian Stefan-Ludwig Hoffmann, who researches and teaches at Berkeley, has reconstructed Koselleck's intellectual biography and his unwritten book on the basis of previously unpublished material from his estate: his Historik.