Critics of the constructivist interpretation of Kant's ethics point out that the basic argument for constructivism emerges from the analysis of obligation in Groundwork of the Metaphysics of Morals, but there are also realist strands in Kant's works.
Although all of Kant's work develops his ethical theory, it is most clearly defined in Groundwork of the Metaphysic of Morals, Critique of Practical Reason and Metaphysics of Morals.
If there is a rationale behind Livingstone's comments it can be found, perhaps, in Immanuel Kant's claim in the Groundwork of the Metaphysics of Morals that the only thing that is uniquely good is a good will.
Kant's most influential positions are found in The Groundwork of the Metaphysics of Morals (hereafter, "Groundwork") but he developed, enriched, and in some cases modified those views in later works such as The Critique of Practical Reason, The Metaphysics of Morals, Anthropology from a Pragmatic Point of View and Religion within the Boundaries of Mere Reason.
Instances of direct influence include Kant's idea of the categorical imperative, the third formulation of which in the Groundwork of the Metaphysic of Morals (the so-called formula of the kingdom of ends) recalls Rousseau's discussion of the general will in The Social Contract.
In the first Critique there are only hints as to the form Kant's moral theory would take,[15] and the account of practical reason in the Groundwork of the Metaphysics of Morals (1785) and Critique of Practical Reason (1788) is radically new.
You will need to put in the groundwork of thinking about the consequences of what you wish to do and what you say and while advice is helpful, listening to your instincts and using your own relationship skills matter most.
In both the Groundwork of the Metaphysics of Morals and the Critique of Practical Reason, Kant also gives a more detailed argument for the conclusion that morality and freedom reciprocally imply one another, which is sometimes called the reciprocity thesis (Allison 1990).
We should not confuse Kant's concepts of the good will and moral worth in Groundwork I with his conceptions of virtue and the virtues that emerge in his more mature, normative works.
Athletes start fighting from a standing position, but most of the combat takes place in groundwork [3].
But both in his normative works and in his foundational work, the Groundwork of the Metaphysics of Morals, Kant makes explicit that the supreme moral principle itself must be discovered a priori, through a method of pure moral philosophy (G 4 387 92).
