position of social science. For the scholar is condemned to guess as shrewdly as he can why in a situation not clearly understood something or other may have happened. But the expert who is employed as the mediator among representatives, and as the mirror and measure of administration, has a very different control of the facts. Instead of being the man who generalizes from the facts dropped to him by the men of action, he becomes the man who prepares the facts for the men of action. This is a profound change in his strategic position. He no longer stands outside, chewing the cud provided by busy men of affairs, but he takes his place in front of decision instead of behind it. To-day the sequence is that the man of affairs finds his facts, and decides on the basis of them; then, some time later, the social scientist deduces excellent reasons why he did or did not decide wisely. This ex post facto relationship is academic in the bad sense of that fine word. The real sequence should be one where the disinterested expert first finds and formulates the facts for the man of action, and later makes what wisdom he can out of comparison between the decision, which he understands, and the facts, which he organized.
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For the physical sciences this change in strategic position began slowly, and then accelerated rapidly. There was a time when the inventor and the engineer were romantic half-starved outsiders, treated as cranks. The business man and the artisan
