John Stuart Mill criticized Immanuel Kant and his Classorical Imperative. What he says is that nobody will adopt the result that they generally adopted. "If that is accurate, this is a debilitating critique of Kant's moral theory.
The fundamental principles of John Mill's utilitarianism and Emanuel Kant's moral metaphysics suggest different views of the two philosophers about the field of moral philosophy. Compared to Kant 's metaphysical segmentation and its use in proof of validity and error, Mill' s utilitarianism is a more sophisticated ethical theory. Kant takes his confirmation of metaphysical survival as discipline of his moral philosophy. If the law has moral power it will be the foundation.
When Kant holds the theory of rationalism, Mill has an empirical theory. Kant is morally ethical in the form he believes, it is necessary for practical judgment of freedom and reason. Utilitarian theory of Miller is a kind of resultism. Because the correctness and badness of behavior depends on the outcome. Kant's pure ethics is the basis of his absolute command and provides the basis for his theory of universal duty. Utilitarian theory of Miller is the main form of resultantism
Both Kant and Mill's ethical theory suggest basic basic principles. With this, any moral actor can test his actions and judge the validity and error of that morality. In Kant's system, the central moral concept is the responsibility and the inner human values are autonomy and dignity, all derived from the essence of rational human nature. Muller builds his theory based on empirically determined human perceptions and goal-oriented behavior that humans can observe when pursuing happiness and avoiding pain and suffering. The basic concept of morality discovered by Kant and Mill seems to be necessary for a complete explanation of our common moral sentiments and beliefs. In addition, they all provide a general principle that we can include specific actions and dependent moral rules to test their moral acceptability and effectiveness.