According to Theosophy, "primitive" man in Europe was as the successor of a highly civilized man who lived ages before on the sunken continent of Atlantis, passing through a cycle of degradation as a consequence of his abuse of his opportunities in previous incarnations. Though the cubic capacity of the skulls of the earliest primitive races, so-called, is about the same as that of modern races, the possession of a large brain does not imply that they had a high civilization. This can be seen clearly in the case of the Eskimo, who have even more capacious skulls than some highly civilized races. A low condition of life amid a people who possess good brain development means either the presence of undeveloped Egos of limited experience, or of those who are suffering disabilities in consequence of past wrong-doing. In either case they are necessarily using the physical vehicles provided by heredity. H. P. Blavatsky says the evil Karma (the influence set in motion by past actions) generated by the sins of the Atlanteans heavily handicapped those Egos when they reappeared on the newly-forming European and Asiatic (in part) continents, and prevented them for long ages from rising out of the primitive conditions in which they found themselves. It is a fact that man's mind is an incarnation from something very different from the material plane; it comes into humanity from its own plane. The Theosophical teachings show how each of the complex "principles" or constituents which compose the human personality, the vehicle of the Immortal Ego, is derived from its own plane or source, i. e., the physical body from the material, molecular world; the body-center of passions and desires from the plane or world of Desire, Kâma-Loka; and so forth. This is fully explained in the Theosophical literature, especially, of course, in the writings of the Theosophical Leaders. It is a most important clue, leading to many practical consequences, owing to the better understanding it gives of the causes of many of our human sufferings, of the rationale of the death-process, of the spread of epidemics, both physical and mental, and so forth. Theosophy does not fall into the materialistic error of imagining that mind is the product of some jugglery of blind forces playing with the molecules of inert matter--that the less can be the origin of the greater. When our psychologists have learned how the mind comes from its own plane, evolving in its own way, and incarnating in material forms to help them on in _their_ evolution, they will find a new sphere of research, and the text-books will have to be rewritten.