This paper examines the position of Kant’s “ The Metaphysical First Principles of the Doctrine of
Right ” , especially his theory of private law in critical philosophy, in other words its relation to
“Critique of Pure Reason” and “Critique of Practical Reason” using Petersen’s thesis as a starting
point. In doing so, the analysis will focus on the theory of possession, property and contract law
within the private law theory.
This analysis will demonstrate that Kant’s “ The Metaphysical First Principles of the Doctrine of
Right ”or the theory of private law is a ‘critical’ philosophy of law and that it can be consistently
incorporated into the system of critical philosophy.