We have, again, the _criminal by passion_. He is usually a man of wholesome birth and of honest life, possessed of keen, even exaggerated sensibilities, who, under the stress of some great, unmerited wrong, has wrought justice for himself. Stung to sudden madness by some gross insult to his wife or wrong to his daughter, he makes an attempt on the life of the offender. The criminal by passion never becomes a recidivist; it is the social, not the anti-social, instincts that are strong within him; his crime is a solitary event in his life. Therefore he cannot figure as a serious danger to society; in some respects he serves even to quicken the social conscience and to check anti-social instincts. At the same time it is not to the advantage of society that a private individual should in a moment of passion even wreak justice; and the criminal by passion cannot complain that he in his turn becomes the victim of a social reaction.
We have also the _insane criminal_; that is to say, the person who, being already in a condition of recognisable mental alienation, performs some flagrantly anti-social act. A very large number of crimes are committed by persons who are impelled by delusions, or who have, before the commission of the crime, been in a condition of mental alienation. Nearly a hundred persons every year in this country are sent to prison to be found insane on admission. The hanging of persons who are afterwards generally regarded as insane has always, and is still, frequently carried on. In Germany Dr. Richter has shown that out of 144 lunatics who were, as was afterwards shown, at the date of their crimes in the highest degree insane, only 38 were recognised as insane before the judge--_i.e._, 106 madmen were, on account of their madness, condemned to severe punishment. Out of 100 insane persons brought to the bar of justice only 26 to 28 are recognised as insane.[1] The insane criminal is clearly in a category of his own. He is only a criminal in the same sense as an infant or an animal who performs some noxious act. The lunatic may be influenced by the same motives that influence the sane person, but he is at the same time impelled by other motives peculiar to himself, and to which we may have no means of access. To bring all the solemn formalities of law to bear against a madman, and to condemn him to severe punishment, is in a civilised country unreasonable.