movement in the sciences which in their application are indispensable to the progress of civilized social reform. There has been a process of mutual action and reaction between science and practice. The social movement has stimulated the development of abstract science, and the new progress in science has enabled further advances to be made in social practice. The era of expansion in sanitation was the era of development in chemistry and physics, which alone enabled a sound system of sanitation to be developed. The fight against disease would have been impossible but for bacteriology. The new care for human life, and for the protection of its source, is associated with fresh developments of biological science. Sociological observations and speculation, including economics, are intimately connected with the efforts of social reform to attain a broad, sound, and truly democratic basis.
When we survey this movement as a whole, we have to recognize that it is exclusively concerned with the improvement of the conditions of life. It makes no attempt to influence either the quantity or the quality of life. 7 It may sometimes have been carried out with the assumption that to improve the conditions of life is, in some way or other, to improve the quality of life itself. But it accepted the stream of life as it found it, and while working to cleanse the banks of the stream it made no attempt to purify the stream itself.
It must, however, be remembered that the arguments which, especially nowadays, are brought against the social reform of the condition of life, will not bear serious examination.