THE emotional and intellectual unrest of our day is too often treated as a novel and disquieting phenomenon indicating the imminent collapse of the whole social structure. The situation exists, it is true; yet it is hardly a cause for alarm, except as it stimulates the quacking of so many anserine saviors. All peoples, in all ages, have been in similar states of flux, for the simple reason that there have always been new ideas demanding attention; and where there are new ideas, there are reactions against them. As a means of retarding the entry of unusual notions, the human cranium is a well-nigh perfect mechanism. Were we more analytically inclined, we should see in such manifestations merely an evidence of progress. The old order passes, and we are reluctant to have it go; our agitation, therefore, marks at once our feeble adaptability and the degree of mental adjustment imposed by the occasion. It may be true that man now confronts a situation requiring a greater change in attitude of mind than any he has faced before, since he is asked to abandon his most primitive, and therefore his dearest, superstitions; but then, he is better prepared through steady practice.
Since the time when Leonardo da Vinci set the true pattern for profiting by experience, some four hundred years ago, the intellectual horizon of mankind has constantly broadened. One by one, traditional illusions have been replaced by demonstrated truth. In turn, mathematical, physical, and chemical concepts have guided human thought into new channels, in spite of all checks and hindrances. And now a fourth group of scholars asks that