1. There is common agreement among anthropologists that man is the descendant of a branch of higher animal life, and that the creation of man took place by a slow, evolutionary process. The slowness of this developmental process does not necessarily lessen the mysterious or miraculous character of it. It places the origin of the human race at a much earlier date than was once supposed--perhaps from 200,000 to 500,000 years ago. The animal inheritance of man need not lead anyone to deny the correlative fact that man possesses spiritual qualities not common to the highest developed animals.[XVIII-1] Even the psychic equipment of man can be traced in its origins to the primates with their individual and social instincts. The instinctive bases of human conduct are hundreds of thousands of years old. They are so intrinsically a part of human nature that no discussion of current social problems will neglect the imperiousness of the ancient instinct heritage of the human race. 2. There is extensive anthropologic evidence that mankind had a common origin. The remains of the earliest human beings are found in a region which extends through India from Java to England. From these geographic centers primitive man seems to have migrated in various directions--northeast, southwest, and finally to the Western Hemisphere. Different climatic and environmental conditions affected the migrating groups in different ways. Those who migrated into the tropical regions were retarded because of the enervating climatic factors. Those who reached the frigid zone were also retarded, or subjected to recidivism for a different reason--a harshness of living conditions and an excess of environmental obstacles. The north temperate zone with its fertile lands and its invigorating climate afforded the proper _milieu_ for the development of the race. 3. An important question relates to the alleged potential equality of all races. The common origin of races is admitted, but the question remains open whether, for example, the African races possess the same innate mental abilities as the Caucasian races. The controversy here is sharply drawn between the environmentalists and the eugenists. Each side of the debate has collected a large body of evidence. In reality, the question apparently boils down to this: Have the many centuries of living under the enervating torrid zone conditions effected the African races so deeply that under favorable cultural circumstances they have become incapable of developing beyond a certain mental level which is lower than that attained by the Caucasian races? In the past the answer to this question has been a strong affirmative. The bulk of the evidence that has been collected in recent years indicates that the affirmative answer is incorrect.