Heidegger’s Being and Time has been accused of espousing empty decisionism and relativism. I argue, first, that in fact Being and Time’s stress on the situated character of human judgment is supplemented by a very Kantian account of being human that defi nes appropriate behavior towards all entities possessing a certain character. Its analysis of conscience and guilt attempts to uncover the existential basis for the distinction Kant draws between the phenomenal and the noumenal aspects of the self. Building on (...) this analysis, I claim, Being and Time reaffirms the second version of Kant’s categorical imperative, which states that humanity should never be treated merely as a means, but always also as an end in itself. In the second part of the paper, however, I argue that this proximity to Kant is part of the problem with Being and Time, that some of this work’s shortcomings and dangers in relation to ethics rest precisely in its very Kantian view of what makes an entity worthy of moral concern, and what is owed to others in virtue of their being such worthy entities. As a consequence of this view, not only are all nonhuman animals excluded from moral concern, but, strangely, the intrinsic value of human well-being is itself threatened. (shrink)