These penal substitutes, when they have once been established in the conscience and methods of legislators, through the teaching of criminal sociology, will be the recognised form of treatment for the social factors of crime. And they will also be <p 113>more possible and practical than that universal social metamorphosis, direct and uncompromising, insisted on by generous but impatient reformers, who scorn these substitutes as palliatives because humanitarian enthusiasm causes them to forget that social organisms, like animal organisms, can be only partially and gradually transformed. The idea of these penal substitutes amounts, in short, to this. The legislator, observing the origins, conditions, and effects of individual and collective activity, comes to recognise their psychological and sociological laws, whereby he will be able to obtain a mastery over many of the factors of crime, and especially over the social factors, and thus secure an indirect but more certain influence over the development of crime. That is to say, in all legislative, political, economic, administrative, and penal arrangements, from the greatest institutions to the smallest details, the social organism will be so adjusted that human activity, instead of being continually and unprofitably menaced with repression, will be insensibly directed into non-criminal channels, leaving free scope for energy and the satisfaction of individual needs, under conditions least exposed to violent disturbance or occasions of law-breaking. It is just this fundamental idea of penal substitutes which shows how necessary it is that the sociologist and legislator should have such a preparation in biology and psychology as Mr. Spencer justly insisted on in his ``Introduction to Social Science.'' And it is the fundamental idea rather than the substitutes themselves that we should bear in mind if we <p 114>would realise their theoretical and practical value as part of a system of criminal sociology. As for the efficacy of any particular penal substitute, I readily admit, in some sense at least, the partial criticisms which have been passed upon them. Apart from such as simply say that they do not believe in the use of alternatives to punishment, and such as confine themselves to the futile question whether this theory belongs to criminal science or to police administration, a majority of criminal sociologists have now definitely accepted the doctrine of penal substitutes. This theory is accepted, not as an absolute panacea of crime, but, as I have always stated it, in the sense of a combination of measures analogous to penal repression; in place of trusting solely to repression for the defence of society against crime. Let us take note of a few examples.