III. If Catholic doctrines deserve mention for their conservativism, it is necessary to record the names of Stahl, Ahrens, and Trendelenburg, for no other reason than the great popularity that they enjoyed in the schools. Stahl divides the ethical action of man into two domains, differing in content and character. This dualism is founded upon the double relation of human existence, individual and social, which gives rise to two forms of imperatives: to the imperative of the individual will, of religion, and of morality, and to that which aims at moulding social life and is the imperative of rights. This theory, which has a varied terminology, can be reduced to the theory of exteriority (sociality, rights), and interiority (individuality, morality). In a very similar way Ahrens includes law in the science of the good or Ethic--the fundamental science. He remarks that good intention, virtue, are not sufficient to secure to man that complex of material and spiritual goods of which he has need, and therefore there must be a second mode of effecting in the good, which what is of importance would be, not the motives of the will, but the pursuit of the good and its real existence in life. Trendelenburg (who regrets the classical concept of the identity of Ethic and Law and looks upon the time when they began to be distinguished as a beginning of degeneration) discovers three sides to rights: the _logical,_ the _ethical,_ and the _physical_ (compulsion),[22] of which none, as we see, is truly judicial. [Sidenote: _Utilitarians._]