I wish to outline another approach to social engineering, namely, that of piecemeal engineering. It is an approach which I think to be methodologically sound. The politician who adopts this method may or may not have a blueprint of society before his mind, he may or may not hope that mankind will one day realize an ideal state, and achieve happiness and perfection on earth. But he will be aware that perfection, if at all attainable, is far distant, and that every generation of men, and therefore also the living, have a claim; perhaps not so much a claim to be made happy, for there are no institutional means of making a man happy, but a claim not to be made unhappy, where it can be avoided. They have a claim to be given all possible help, if they suffer. The piecemeal engineer will, accordingly, adopt the method of searching for, and fighting against, the greatest and most urgent evils of society, rather than searching for, and fighting for, its greatest ultimate good. …
In favour of his method, the piecemeal engineer can claim that a systematic fight against suffering and injustice and war is more likely to be supported by the approval and agreement of a great number of people than the fight for the establishment of some ideal. The existence of social evils, that is to say, of social conditions under which many men are suffering, can be comparatively well established. Those who suffer can judge for themselves, and the others can hardly deny that they would not like to change places. It is infinitely more difficult to reason about an ideal society. Social life is so complicated that few men, or none at all, could judge a blueprint for social engineering on the grand scale; whether it be practicable; whether it would result in a real improvement; what kind of suffering it may involve; and what may be the means for its realization. As opposed to this, blueprints for piecemeal engineering are comparatively simple. They are blueprints for single institutions, for health and unemployed insurance, for instance, or arbitration courts, or anti-depression budgeting, or educational reform. If they go wrong, the damage is not very great, and a re-adjustment not very difficult. They are less risky, and for this very reason less controversial. But if it is easier to reach a reasonable agreement about existing evils and the means of combating them than it is about an ideal good and the means of its realization, then there is also more hope that by using the piecemeal method we may get over the very greatest practical difficulty of all reasonable political reform, namely, the use of reason, instead of passion and violence, in executing the programme. There will be a possibility of reaching a reasonable compromise and therefore of achieving the improvement by democratic methods. [ch. 9, 171-3]
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