Pagan morality is different from Christian morality. Feudal morality differs from modern bourgeois morality as does bravery from solvency. In brief, we need no detailed illustration to show that different times and nations have different moralities. We have but to understand that this change is necessary, a special characteristic of the human race and of its historical development, and we shall then exchange the belief in "eternal truths," which every ruling class claims to be identical with its own selfish laws, for the scientific knowledge that absolute right is purely a concept which we derive by means of the faculty of thought from the various successive rights. Right as an absolute concept means no more and no less than any other general concept, for instance, the head in general. Every real head is a concrete one and belongs either to man or to some other animal, it is either long or broad, narrow or wide, in other words it has special peculiarities. But at the same time, every concrete head has certain general qualities which are universal in all heads, for instance the quality of being the superintendent of the body. Moreover, every head has as many general as individual traits, it is no more personal than it is common. The faculty of thought abstracts the general traits from the actual concrete heads and in this way creates the concept of the absolute head. Just as the absolute head, or _the_ head, is composed of the general qualities of all heads, so the absolute right stands merely for the general characters of all rights. Both of these concepts exist merely as ideas, not as objects. Every real right is a concrete right, it is right only under certain conditions, at definite periods, for this or that nation. "Thou shalt not kill," is right in peace, but wrong in war; it is right for the majority of bourgeois society that wishes to see the outbursts of passion controlled in the interest of its own predominant needs, but wrong for the savage who has not arrived at the period where a peaceful and social life is appreciated, and who therefore would consider the above commandment as an immoral restriction of his liberty. For the love of life, murder is a detestable abomination, for revenge it is a sweet satisfaction. In the same way robbery seems right to the robber, wrong to the robbed. There can be no question of any absolute wrong in such cases, only of wrong in a relative sense. An action is wrong in a general sense only in so far as it is generally disliked. Plain robbery is wrong in the opinion of the great majority today because our generation takes more interest in bourgeois affairs of commerce and industry than in the adventures of the knights of the road.