Why is it important to devote this attention to Kant's last published work in the philosophy of physics? The excellent essays in the volume will answer the question. I will provide some schematic comments designed to provide an image leading from the general question to its very specific answers. Kant is best known for his monumental Critique of Pure Reason and for his writings in ethical theory. His "critical" philosophy requires an initial sharp division of knowledge into its theoretical and practical parts. Moral perfection of attempts to act out of duty is the aim of practical reason. The aim of theoretical reason is to know the truth about material and spiritual nature. Springer Verlag.