Among all people, and at all times, the difference between good and evil, truth and falsehood, has been recognized. The abstract idea of moral good and moral evil may certainly differ in different people: one may admire, what the other detests; in one nation, that, may be held in good repute, which, in another, is a criminal offence; yet, after all, the abstract notion of evil and good, does not cease to exist. Observance of the right of property, self-respect, and regard for human life, are to be found among all nationalities. If man, in his savage state, occasionally casts aside these moral notions, it is in consequence of the social condition of the tribe to which he belongs, and must be regarded in connexion with the customs of war and the feeling of revenge. But, in a state of tranquillity and peace, which condition the philosopher and student must presuppose in framing their arguments, the notion of evil and good is always to be found. The forms which the feeling of honour dictates, vary for example in the white man and the savage, but the feeling itself is never eradicated from the heart of any.

The religious feeling, the notion of divinity, is another characteristic which has its origin in the faculty of abstraction. This sentiment is indissolubly allied to human intelligence. Without wishing, with an eminent French anthropologist, M. de Quatrefages, to make of religiosity a fundamental attribute of humanity, and a natural characteristic of our species, we may say that all men are religious, that they acknowledge and adore a Creator, a Supreme God. Whether the statement that certain people, such as the Australians, Bushmen, and Polynesians, are atheists, as we are assured by some travellers, and whether the reproaches bestowed upon them in consequence of this, are well-founded, or whether it is the fact that the travellers who bore this testimony understood but little of the language and signs of these different people, as has been suggested by M. de Quatrefages, are matters of relatively slight importance. The state of brutality of certain tribes, buried in the midst of inaccessible and savage countries, and the intellectual imperfection which follows, concealing from them the notion of God, are nothing when compared with the universality of religious belief which stirs in the hearts of the innumerable populations spread over the face of the earth.

Language and writing gave birth to human associations, and later on, to civilization, by which they were transformed. It is curious to follow out the progressive forms of human association, and point out the stages which civilization has passed through in its forward march.

Primitive societies assumed three successive forms. Men were in the first instance, hunters and fishers, then herdsmen, and lastly husbandmen. We say, populations were first of all hunters and fishers. The human race then inhabiting the earth, was but small in number, and this explains it. A group of men gaining their livelihood simply by hunting and fishing, cannot be composed of a very large number of individuals. A vast extent of territory is required to nourish a population, which finds in game and fish its sole means of subsistence. Moreover, this manner of living is always precarious, for there never is any certainty that food will be found for the morrow. This continual preoccupation in seeking the means of subsistence, brings man nearer to the brute, and hinders him from exercising his intellect upon ennobling and more useful subjects. Hunting is, moreover, the image of warfare, and war may very easily arise between neighbouring populations who get their living in the same manner. If in these eventual collisions, prisoners are taken, they are sacrificed in order that there may be no additional mouths to feed.

So long, therefore, as human societies were composed only of hunters and fishers, they were unable to make any intellectual progress, and their customs, of necessity remained barbarous. The death of prisoners was the order of battle.

Societies of herdsmen succeeded those of hunters and fishers. Man having domesticated first the dog, then the ox, the horse, the sheep or the llama, by that means ensured his livelihood for the morrow, and was enabled to turn his attention to other matters besides the quest of food. We therefore see pastoral societies advancing in the way of progress, by the improvement of their dress, their weapons, and their habitations.

But pastoral communities have also need of large tracts of country, for their herds rapidly exhaust the herbage in one region, and they must therefore seek farther for pastures, in order that they may be sure of their food, when that is confined to flesh and milk. Pastoral populations were therefore of necessity nomadic.

In their reciprocal migrations, pastoral tribes frequently came into collision, and found it necessary to dispute by armed force the possession of the soil. War ensued. Since the prisoners taken could be maintained with comparative ease by the conqueror on condition of their lending assistance, they were forced to become slaves, and it is thus that the sad condition of slavery, which was later on to extend in so aggravated a degree as to develop into a social grievance, had its origin.