| Groundwork of the metaphysics of morals(hereinafter referred to as the Groundwork)is the foundation of understanding and grasping Kant’s ethics,and plays an extremely important role in Kant’s philosophy.With the influence of the enlightenment movement expanding in depth and the need to criticize doctrines such as "dogmatism",Kant tried to construct the metaphysics of morality,so the book "the Groundwork" with moral law as the core came out.In Kant’s philosophical system,the thought of moral law realizes the combination of his ontology and ethics.By establishing the concept of "will self-discipline",Kant criticized the mysticism,dogmatism and other thoughts since the middle ages,initiated the "Copernican" revolution in the history of philosophical thought,and completed his construction of reason and establishment of critical philosophy.At the same time,Kant affirmed that human being,as a rational being,is the real subject of moral choice in his book the Groundwork.Therefore,morality is transformed from the external other-discipline existence to the internal self-discipline existence in the history of ethical thoughts.In addition,Kant also set up such concepts as "kingdom of purpose" to establish a relatively complete logic for the existence of moral theory,which is also the great point of Kant’s philosophy of morality in the history of ethical thoughts.Through the analysis of the historical background and the basic content of the writing of the Groundwork,and the discussion of the deductive process of Kant’s moral theory in the Groundwork,the deductive logic of Kant’s moral theory can be explored,which can also explain the philosophy of Kant and the context of Kant’s moral philosophy and its philosophical significance.At the same time,because of the duality of Kant’s moral philosophy in Kant’s philosophy,there are some theoretical deficiencies in the construction logic of moral theory.But the reflection to the real society,has caused the moral theory thought to have the corresponding rationality and the limitation.The analysis of the rationality of Kant’s thought of moral theory is helpful to establish a reasonable ultimate direction for current morality.And the analysis of the limitation of moral theory thought is also conduciveto the analysis of its shortcomings,can make moral theory thought more conform to the change of social practice,more conducive to guide the development of practical morality.This has the indispensable important function to the contemporary society harmonious law and the social morality construction. |