It is scarcely necessary to cite the universal distrust, often contempt, that the half-breed between two sharply contrasted races inspires the world over. Belonging physically and spiritually to the lower race, but aspiring to recognition as one of the higher race, the unfortunate mongrel, in addition to a disharmonic physique, often inherits from one parent an unstable brain which is stimulated and at times overexcited by flashes of brilliancy from the other. The result is a total lack of continuity of purpose, an intermittent intellect goaded into spasmodic outbursts of energy.
The essential character of all these racial mixtures is a lack of harmony - both physical and mental - in the first few generations. Then, if the strain survives, it is by the slow reversion to one of the parent types - almost inevitably the lower.