THE IDEA OF PURITY OF SCIENCE AND THE SOCIAL SCIENCES
The author finds attitude rather than belief to be motivating force in human actions. The idea of purity of science does not forbid the scientist to express his personal judgments; what it does is to demand that he should himself realize that in doing so he trespasses the limits of science and, moreover, that he should make others realize it. The essential difference between social engineering and technology is that in social life it is steadily necessary to choose from among conflicting values. A politician acts rightly when he listens to the opinions of experts but still he is the one who bears the ultimate responsibility for the decisions he makes.