It will perhaps be argued that, by deriving the characteristics of moral indignation from its connection with custom, we implicitly contradict our initial assumption that moral emotions lie at the bottom of all moral judgments. But it is not so. Custom is a moral rule only on account of the indignation called forth by its transgression. In its ethical aspect it is nothing but a generalisation of emotional tendencies, applied to certain modes of conduct, and transmitted from generation to generation. Public indignation lies at the bottom of it. In its capacity {122} of a rule of duty, custom, _mos_, is derived from the emotion to which it gave its name. As public indignation is the prototype of moral disapproval, so public approval, expressed in public praise, is the prototype of moral approval. Like public indignation, public approval is characterised by a flavour of generality, by disinterestedness, by apparent impartiality. But of these two emotions public indignation, being at the root of custom and leading to the infliction of punishment, is by far the more impressive. Hence it is not surprising that the term "moral" is etymologically connected with _mos_, which always implies the existence of a social rule the transgression of which evokes public indignation. Only by analogy it has come to be applied to the emotion of approval as well. Though taking their place in the system of human emotions as public emotions felt by the society at large, moral disapproval and approval have not always remained inseparably connected with the feelings of any special society. The unanimity of opinion which originally characterised the members of the same social unit was disturbed by its advancement in civilisation. Individuals arose who found fault with the moral ideas prevalent in the community to which they belonged, criticising those ideas on the basis of their own individual feelings. Such rebels are certainly no less justified in speaking in the name of morality true and proper, than is society itself. The emotions from which their opposition against public opinion springs may be, in nature, exactly similar to the approval or disapproval felt by the society at large, though they are called forth by different facts or, otherwise, differ from these emotions in degree. They may present the same disinterestedness and apparent impartiality--indeed, dissent from the established moral ideas largely rises from the conviction that the apparent impartiality of public feelings is an illusion. As will be seen, the evolution of the moral consciousness involves a progress in impartiality and justice; it tends towards an equalisation {123} of rights, towards an expansion of the circle within which the same moral rules are held applicable; and this process is in no small degree effected by the efforts made by high-minded individuals to raise public opinion to their own standard of right. Nay, as we have already