By this term the author wanted to designate the stubborn ques tion, most exactly approximated by the term coherence in its ap plication to history.
In order to appreciate the consequences of continuity as well as of discontinuity, it was necessary to identify and to emphasize a touchstone-question, endowed with the quality of great per durability, and to summon before it all of the protagonists, in cluding Heidegger himself, in an intellectual combat dating back nearly a hundred years. Standing out in the foreground of this land scape are the two mountains constituted by Sein und Zeit and Hei degger's work following the Kehre. Martin Heidegger and the Problem of Historical Meaning His training as an his torian, complemented by that of the philosopher, has served him richly, not only in the discovery of rare texts and of unpublished correspondence but in the reconstruction of the philosophical landscape at the beginning of the century, and then in the period between the two wars.