Then, like the hand that appeared at Belshazzar's Feast, came the War, only it was a hand that stayed with a long flashing lightning sword in its grip, sweeping pitilessly among the erstwhile dancing multitudes to mutilate and destroy. A good many people, with that sturdy animality George Santayana speaks somewhere of as a trait of mankind, set out to enjoy the War. It was a new sort of good time upon an incredibly large scale. It was an undreamed-of opportunity. The mechanisms of suppression of the mind render it incapable of appreciating horror until encountered. And so thousands with dangerously unstable adrenals were plunged into the most trying conditions possible. Hundreds of them, already shaken, on the borderland of instability, reacted with the phenomena of breakdown of control, lumped with a host of other phenomena, under the general rubric of "shell shock." That alone was not all. If hundreds collapsed, thousands approached the verge of collapse. They survived and were discharged from the armies as normal. They reappear in civil life as cases of "nerves." Ordinarily that would mean that they would be classed as failures. But such have been the psychologic reactions to the war that all kinds of compensations in the way of dangerous mental states have become frequent in these inadequate adrenal types. A trend to violence and a resentful emotionalism are combined with desperate attempts to spur the jaded adrenals with artificial excitements. Consequent melancholia and depression, the "blues," are inevitable. A survey of drug addicts would probably show a definite percentage of this type. The same applies to certain petty criminals and law breakers. The adrenal element in the personality must be considered in every disturbance, morbid, personal, or social involving brunette types, Huxley's dark white, Mediterranean-Iberians, red-haired persons, and even pigment-spotted fair people. Historians have traced the earliest civilization to the doings of a brunette people, the Sumerians, the first to build cities in the Euphrates-Tigris region more than five thousand years before Christ was born. An adrenalized people one would, expect to be the first to take advantage of possibilities because of their energy capacity. The earliest Sumerian stone carvings of warriors exhibit an undersized skeleton compared with the large head, broad face, a low hair line and prominent nose that would fit into the ensemble of the adrenal type. Certain other historical aspects of the adrenal personality have yet to be worked out. THE PITUITARY PERSONALITIES