There is a time for boys to learn to swim, hunt, fish, build huts, make boats, gather collections, play ball, love nature, work; or by neglect of this time, to lack interest in both work and play for the rest of their lives. There is a time also for learning the social arts and the social virtues. If this time passes with these lessons unlearned, it becomes highly improbable that they ever will be learned at all. So far, then, as education is a biological question, it tends to resolve itself into the problem of utilizing the boy’s instinctive interests as a basis for his formal training. This is especially true of his moral education. We take the boy at an impressionable age, an age during which he is probably more plastic than at any other time of life, either before or after. We can lead him through the group life of the gang, while the social instincts are being born and fashioned, into a social life of the highest ideals and devotion; or on the other hand, we may make him an unsocial or an anti-social being for life. The gang is a natural and a necessary stage in normal development. Carefully watched and wisely controlled, it is both the most natural and the least expensive instrument that we can employ to help our sons through one of the most critical periods of their lives. Nine tenths of the gang’s activities depend on primitive instinctive impulses, which cannot be suppressed, and which need only to be sanely guided to carry the boy along the path which nature has marked out and bring him out at the end a useful citizen and a good man. The men who have been most successful in handling boys, men like Arnold of Rugby, Judge Lindsay and William R. George, are precisely the men who have appealed most powerfully to those boyish impulses. Of all the gang-nurtured social virtues, loyalty and its allies stand easily first. The gang, indeed, exists only because of the loyalty of its members to one another. Without this mutual loyalty there could be no gangs. All the great leaders and successful trainers of boys use the lever of loyalty in reaching and holding their boys. Note the words of Judge Lindsay with Harry. “Judge! Judge! If you let me go, I’ll never get you into trouble again!” “I had him. It was the voice of loyalty. I have used that appeal to loyalty hundreds of times since in our work with boys and it is almost infallibly successful.” If we study the secret of the power of William R. George, we find him using the same strong lever. He trusts boys; he appeals to their loyalty; and he wins the toughest boys, with whom many others have failed.