There is probably no limit to what science can do in the way of increasing positive ex cellence. There is a certain attitude about the application of science to human life with which I have some sympathy, though I do not, in the last analysis, agree with it. It is the attitude of those who dread what is "unnatural". Rousseau is, of course, the great pro tagonist of the view in Europe. In Asia, Lao-Tze had set it forth even more persuasively, and 2,400 years sooner.