Our brief consideration of some of the mental activities of man in civilized and in primitive society has led us to the conclusion that these functions of the human mind are common to the whole of humanity. It may be well to state here, that, according to our present method of considering biological and psychological phenomena, we must assume that these have developed from lower conditions existing at a previous time, and that at one time there certainly must have been races and tribes in which the properties here described were not at all, or only slightly, developed; but it is also true that among the present races of man, no matter how primitive they may be in comparison with ourselves, these faculties are highly developed. It is not impossible that the degree of development of these functions may differ somewhat among different types of man; but I do not believe that we are able at the present time to form a just valuation of the hereditary mental powers of the different races. A comparison of their languages, customs, and activities suggests that their faculties may be unequally developed; but the differences are not sufficient to justify us to ascribe materially lower stages to some peoples, and higher stages to others. The conclusions reached from these considerations are therefore, on the whole, negative. We are not inclined to consider the mental organization of different races of man as differing in fundamental points. Although, therefore, the distribution of faculty among the races of man is far from being known, we can say this much: the average faculty of the white race is found to the same degree in a large proportion of individuals of all other races, and, although it is probable that some of these races may not produce as large a proportion of great men as our own race, there is no reason to suppose that they are unable to reach the level of civilization represented by the bulk of our own people. ------------------------------------------------------------------------ V. RACE AND LANGUAGE IN the last chapter I tried to show that the principal characteristics of the mind of primitive man occur among primitive tribes of all races, and that therefore the inference must not be drawn that these traits of the mind are racial characteristics. This negative conclusion, which is based entirely on the consideration of a few selected points that occur with great regularity in the description of primitive tribes, does not give us, however, proof positive of the lack of all correlation between mental life and racial descent, and we must direct our attention to those cases in which an immediate relationship between the two may be and has been claimed.