Abstract

The subject of the book is two twentieth-century ontological projects: the critical ontology of Nicolai Hartmann and the fundamental ontology of Martin Heidegger. The author presents their works as well in a historical as a systematical perspective. The book focuses on those contexts of their thoughts, which have been often overlooked. Hartmann and Heidegger’s ontology is presented first in their relation to Kant, secondly in reference to neo-Kantianism, and thirdly in relation to each other. One of the main thesis of the book is that the most important difference between Hartmann and Heidegger’s interpretation of Kant, and - in consequence - also between their own projects of a new ontology, results from the ambiguity of Kant’s notion of things in themselves, which they interpret and use in a different way.