In this we are confusing advance in culture with brain improvement. If we should assume a certain grade of intelligence, fixed and invariable in all individuals, races, and times—an unwarranted assumption, of course—progress would still be possible, provided we assumed a characteristically human grade of intelligence to begin with. With associative memory, abstraction, and speech men are able to compare the present with the past, to deliberate and discuss, to invent, to abandon old processes for new, to focus attention on special problems, to encourage specialization, and to transmit to the younger generation a more intelligent standpoint and a more advanced starting-point. Culture is the accumulation of the results of activity, and culture could go on improving for a certain time even if there were a retrogression in intelligence. If all the chemists in class A should stop work tomorrow, the chemists in class B would still make discoveries. These would influence manufacture, and progress would result. If a worker in any specialty acquaints himself with the results of his predecessors and contemporaries and works, he will add some results to the sum of knowledge in his line. And if a race preserves by record or tradition the memory of what past generations have done, and adds a little, progress is secured whether the brain improves or stands still. In the same way, the fact that one race has advanced farther in culture than another does not necessarily imply a different order of brain, but may be due to the fact that in the one case social arrangements have not taken the shape affording the most favorable conditions for the operation of the mind.

If, then, we make due allowance for our instinctive tendency as a white group to disparage outsiders, and, on the other hand, for our tendency to confuse progress in culture and general intelligence with biological modification of the brain, we shall have to reduce very much our usual estimate of the difference in mental capacity between ourselves and the lower races, if we do not eliminate it altogether; and we shall perhaps have to abandon altogether the view that there has been an increase in the mental capacity of the white race since prehistoric times.

The first question arising in this connection is whether any of the characteristic faculties of the human mind—perception, memory, inhibition, abstraction—are absent or noticeably weak in the lower races. If this is found to be true, we have reason to attribute the superiority of the white race to biological causes; otherwise we shall have to seek an explanation of white superiority in causes lying outside the brain.

In examining this question we need not dwell on the acuteness of the sense-perceptions, because these are not distinctively human. As a matter of fact, they are usually better developed in animals and in the lower races than in the civilized, because the lower mental life is more perceptive than ratiocinative. The memory of the lower races is also apparently quite as good as that of the higher. The memory of the Australian native or the Eskimo is quite as good as that of our "oldest inhabitant;" and probably no one would claim that the modern scientist has a better memory than the bard of the Homeric period.

There is, however, a prevalent view, for the popularization of which Herbert Spencer is largely responsible, that primitive man has feeble powers of inhibition. Like the equally erroneous view that early man is a free and unfettered creature, it arises from our habit of assuming that, because his inhibitions and unfreedom do not correspond with our own restraints, they do not exist. Sir John Lubbock pointed out long ago that the savage is hedged about by conventions so minute and so mandatory that he is actually the least free person in the world. But, in spite of this, Spencer and others have insisted that he is incapable of self-restraint, is carried away like a child by the impulse of the moment, and is incapable of rejecting an immediate gratification for a greater future one. Cases like the one mentioned by Darwin of the Fuegian who struck and killed his little son when the latter dropped a basket of fish into the water are cited without regard to the fact that cases of sudden domestic violence and quick repentance are common in any city today; and the failure of the Australian blacks to throw back the small fry when seining is referred to without pausing to consider that our practice of exterminating game and denuding our forests shows an amazing lack of individual self-restraint.

The truth is that the restraints exercised in a group depend largely on the traditions, views, and teachings of the group, and, if we have this in mind, the savage cannot be called deficient on the side of inhibition. It is doubtful if modern society affords anything more striking in the way of inhibition than is found in connection with taboo, fetish, totemism, and ceremonial among the lower races. In the great majority of the American Indian and Australian tribes a man is strictly forbidden to kill or eat the animals whose name his clan bears as a totem. The central Australian may not, in addition, eat the flesh of any animal killed or even touched by persons standing in certain relations of kinship to him. At certain times also he is forbidden to eat the flesh of a number of animals and at all times he must share all food secured with the tribal elders and some others.

A native of Queensland will put his mark on an unripe zamia fruit, and may be sure that it will be untouched and that when it is ripe he has only to go and get it. The Eskimos, though starving, will not molest the sacred seal basking before their huts. Similarly in social intercourse the inhibitions are numerous. To some of his sisters, blood and tribal, the Australian may not speak at all; to others only at certain distances, according to the degree of kinship. The west African fetish acts as a police, and property protected by it is safer than under civilized laws. Food and palm wine are placed beside the path with a piece of fetish suspended near by, and no one will touch them without leaving the proper payment. The garden of a native may be a mile from the house, unfenced, and sometimes unvisited for weeks by the owner; but it is immune from depredations if protected by fetish. Our proverb says, "A hungry belly has no ears," and it must be admitted that the inhibition of food impulses implies no small power of restraint.

Altogether too much has been made of inhibition, anyway, as a sign of mentality, for it is not even characteristic of the human species. The well-trained dog inhibits in the presence of the most enticing stimulations of the kitchen. And it is also true that one race, at least—the American Indian—makes inhibition of the most conspicuous feature in its system of education. From the time the ice is broken to give him a cold plunge and begin the toughening process on the day of his birth, until he dies with out a groan under torture the Indian is schooled in the restraint of his impulses. He does not, indeed, practice our identical restraints, because his traditions and the run of his attention are different; but he has a capacity for controlling impulse equal to our own.

Another serious charge against the intelligence of the lower races is lack of the power of abstraction. They certainly do not deal largely in abstraction, and their languages are poor in abstract terms. But there is a great difference between the habit of thinking in abstract terms and the ability to do so.