The proposition needs only to be stated in this frank form, to arouse an instinctive protest on the part of most Americans. Yet it has been urged in an almost equally frank form by many writers, from the days of the abolitionists to the present, and it seems to be the logical consequence of the position adopted by such anthropologists as Professor Boas, and by the educators and others who proclaim that there are no significant differences between the Negro and the white, except such as are due to social conditions and which, therefore, can be removed. But what are these social differences, which it is the custom to dismiss in such a light-hearted way? Are they not based on fundamental incompatibilities of racial temperament, which in turn are based on differences in heredity? Modern sociologists for the main part have no illusions as to the ease with which these differences in racial tradition and custom can be removed. The social heritage of the Negro has been described at great length and often with little regard for fact, by hundreds of writers. Only a glance can be given the subject here, but it may profitably be asked what the Negro did when he was left to himself in Africa. "The most striking feature of the African Negro is the low forms of social organization, the lack of industrial and political cooperation, and consequently the almost entire absence of social and national self-consciousness. This rather than intellectual inferiority explains the lack of social sympathy, the presence of such barbarous institutions as cannibalism and slavery, the low position of woman, inefficiency in the industrial and mechanical arts, the low type of group morals, rudimentary art-sense, lack of race-pride and self-assertiveness, and in intellectual and religious life largely synonymous with fetishism and sorcery."[132] An elementary knowledge of the history of Africa, or the more recent and much-quoted example of Haiti, is sufficient to prove that the Negro's own social heritage is at a level far below that of the whites among whom he is living in the United States. No matter how much one may admire some of the Negro's individual traits, one must admit that his development of group traits is primitive, and suggests a mental development which is also primitive. If the number of original contributions which it has made to the world's civilization is any fair criterion of the relative value of a race, then the Negro race must be placed very near zero on the scale.[133] The following historical considerations suggest that in comparison with some other races the Negro race is germinally lacking in the higher developments of intelligence: 1. That the Negro race in Africa has never, by its own initiative, risen much above barbarism, although it has been exposed to a considerable range of environments and has had abundant time in which to bring to expression any inherited traits it may possess.