Kant’s critical philosophy marks the end of a two-thousand year tradition of metaphysics. Against this older tradition, Kant proposes a new metaphysics of knowledge and human freedom with the autonomy of the subject as its principle. Led by the principle of subjectivity, it attempts to obtain a unified understanding of the whole world organized into a system of reason. In this way, the idea of classical metaphysics receives a new controversial interpretation still discussed today. In twelve contributions, the fifth volume of the Yearbook pursues the different forms of groundingmetaphysics after Kant.