People speak of the colossal egotism of Youth. It is not egotism; it is unfathomable ignorance. The youth knows neither himself, the world nor his adversaries. He is unafraid because he does not know the strength of the forces he would conquer. But society learns from the threshings about of its individuals. And it is the young who thresh about. Mailed in their own ignorance, and propelled by their own marvelous energy, the young go forth to conquer. And so the world learns many things. Youth rebels only when it is thwarted in entering the lists and may then turn the flood of its activities into channels of rebellion or revolt against authority. The boy revolts when his father declines to permit him to accomplish the impossible, to invent, discover, explore, to overwhelm. It seems to him that if he received encouragement and help instead of censure at home, the son of the house would soon be recognized by the world as one of the Great Ones of the Earth. When he finds his talents unappreciated, he usually decides to write a book that will influence the whole future course of human events, or a novel that will alter dynasties and change social systems; or he decides to become a powerful political leader, or the silver-tongued orator of the times. Thwarted youth may aspire to become the world's greatest rebel, or the most heroic victim of despotic authority. Even in rebellion youth aspires to conquer the heights, though it be through the depths. A boy finds consolation in planning to become the world's greatest hero or martyr when he is thwarted in becoming an epoch-making inventor, or discoverer. This on the male side of the house. The daughter aspires to beauty, lovely clothes, charm, or to stardom on the theatrical or operatic stage, achievements and characteristics which mean popularity and the ultimate disposal of her wares to the highest available bidder. Listen to a group of boys talking among themselves. You will probably add some useful knowledge to your mental equipment, for you will hear them discussing feats in civil engineering, problems in electricity, mechanics, physics, chemistry, surgery, as well as events in the world of sports. On the other hand, the conversations among girls are almost entirely on the subject of boys, men, clothes and the theatre. The psychology of the sexes in youth is totally different. The ideas of the average young man are those of one who expects to become some day a =producer= or at least a =worker=; the ideas of the average young woman are those of one who =expects= and =intends= (for here, too, Youth sees only personal victory) to rise into the leisure, non-producing or =supported= class.