For if punishment is weak to prevent crime, it is strong to produce it, and it is scarcely open to doubt that its productive force is far greater than its preventive. Our terms of imprisonment compel more persons to enter a career of crime than they prevent from pursuing one, that being often the only resource left for those who depend on a criminals labour. Whether in prison or the workhouse, such dependents become a charge to society; nor does it seem reasonable, that if one man under sore temptation steals a loaf, a hundred other men who do no such thing must contribute to keep, not only the prisoner himself, but his family too, in their daily bread for so long a time as it pleases the law to detain him from earning his and their necessary subsistence.

Whoever, therefore, shall wish to honour me with his criticisms, I would have begin with a thorough comprehension of the purpose of my worka purpose which, so far from diminishing legitimate authority, will serve to increase it, if opinion can effect more over mens minds than force, and if the mildness and humanity of the government shall justify it in the eyes of all men. The ill-conceived criticisms that have been published against this book are founded on confused notions, and compel me to interrupt for a moment the arguments I was addressing to my enlightened readers, in order to close once for all every door against the misapprehensions of timid bigotry or against the calumnies of malice and envy. But there was one great fallacy, pervading our whole criminal law, which Blackstone left undetected and untouched. This was, that the severity of punishment must be augmented in proportion to the increase of temptation, and that the measure of the guilt of a crime lay in the facility with which it might be committed. Among crimes of an equal malignity, says Blackstone, those [deserve most punishment, as most injurious] which a man has the most frequent and easy opportunities of committing, which cannot so easily be guarded against as others, and which, therefore, the offender has the strongest inducement to commit. And on this principle he finds it reasonable, that, while the theft of a pocket-handkerchief should be a capital crime, the theft of a load of hay should only involve transportation.