‘Heidegger’ examines why Heidegger's philosophy remains so important, despite the blatant moral and political failings of its author. For Heidegger, the aim of metaphysics is to explain being, and in modernity this aim is achieved by the sciences. Where, then, does this leave philosophy? The complexity of philosophy's relationship to modernity becomes very apparent in the case of Heidegger. His work offers significant critical means for understanding how the atrocities committed by the Nazis relate to technology's role in modernity. Heidegger offers alternatives to the kind of philosophy which is so beholden to the sciences that it no longer asks questions about the limits of a scientific understanding of existence.