The Black Notebooks: implications for an assessment of Heidegger’s philosophical development

Does the recent publication of Heidegger's Black Notebooks require a re-evaluation of his thought? In the present text we will deal with this question and reach the conclusion that a change of theoretical perspective on Heidegger's work is indeed justified. The franker and less cautious style of the Black Notebooks puts in the foreground stances that were already known, but were previously relegated to the background: it becomes possible thereby to establish that Heidegger's philosophical views host a significant lot of unwarranted prejudices, which are incorporated in his picture of the 'history of being'. We argue that in his process of radical questioning Heidegger progressively drops all available rational methods and epistemic criteria, and that this paves the way to the unwitting reception of personal prejudices in his theoretical frame: Heidegger knowingly abandons all the theoretical instruments that could enable him to discriminate between deeply felt prejudices and proper philosophical intuitions. We conclude our analysis by proposing some criticisms that should be acceptable also to scholars sympathetic with Heidegger's thought. Heidegger's vindication of an 'erratic' way of thinking, where the journey is more qualifying than the result, turns out to be incompatible with the assertiveness of the many unjustified claims disseminated across the Black Notebooks. Moreover, Heidegger wants to show the narrowness of an overwhelmingly dialectical and argumentative attitude, while his late style of thinking unwittingly discredits an alternative philosophical style, that widely appeals to a 'principle of charity' in the collaboration between author and reader.