The epileptic origin of criminality explains many characteristics of the criminal, the genesis of which was previously obscure. Many of the moral and physical peculiarities of born criminals and the morally insane may be classed as professional characteristics acquired through the habit of evil-doing, especially the naso-labial and zygomatic wrinkles, cynical expression, tapering fingers, etc. Many anomalies also in the bones, hair, ears, eyes, and the monstrous development of the jaws and teeth, must be explained by arrested development in the fifth or sixth month of ultra-uterine existence, corresponding to the characteristics of inferior races by the usual law of ontogeny which recapitulates phylogeny. But there is a final series of anomalies, the origin of which was formerly wrapped in mystery: plagiocephaly, sclerosis, the thickening of the meninges, cranial asymmetry, and other changes in the cerebral layers, which can be explained only by a disease altering precociously the whole cerebral conformation, as is exactly the case in epilepsy. The born criminal is an epileptic, not however afflicted with the common form of this disease, but with a special kind. The pathological basis, the etiology, and the anatomical and psychological characteristics are identical, but there are many differences. While in the ordinary form motor anomalies are very common, in the criminal form they are very rare, while in ordinary epilepsy the mental explosions are accompanied by unconsciousness, in the other form they are weakened and spread over the whole existence, and consciousness is, relatively speaking, preserved; and while, finally, the ordinary epileptic has not always the tendency to do evil for its own sake--nay, may even achieve holiness--in the hidden form the bent towards evil endures from birth to death. The perversity concentrated in one second in the motor attack, is attenuated in the second form, but spread over the whole existence. We have therefore an epilepsy _sui generis_, a variety of epilepsy which may be called criminal. Thus the primitive idea of crime has become organic and complete. The criminal is only a diseased person, an epileptic, in whom the cerebral malady, begun in some cases during prenatal existence, or later, in consequence of some infection or cerebral poisoning, produces, together with certain signs of physical degeneration in the skull, face, teeth, and brain, a return to the early brutal egotism natural to primitive races, which manifests itself in homicide, theft, and other crimes. CHAPTER III _THE INSANE CRIMINAL_ GENERAL FORMS OF CRIMINAL LUNACY