Under a convergent variety of interests the concept of mental adjustment has assumed a larger significance and new aspects. Dr. Wells undertakes to interpret and organize the material from which insight has resulted. The fundamental biological conception of adapted conduct, as that conforming to and advancing the welfare of the individual and the race, remains. The increasing understanding of the psychical factor changes the view of the mechanisms by which such adaptation is reached in human lives. It is a complicated matter to make individuals happy, the more complicated the individual and the more complicated the circumstances that control, the greater the complexity of adjustment. The complexity is not alone of the economic and social forces that demand recognition and the types of efficiencies which the struggle for existence thus remodeled enforces; it is also in the inner adjustment of ideas and ideals imposed by the complex structure of the world of belief and by the world of morals through which its edicts are enforced. The simpler biological satisfactions persist. Man cannot renounce his nature without paying the penalty. Modern psychology, while retaining the status of discipline, declines to accept renunciation as a solution. Life remains a struggle and a conflict. But the manner of its conduct is profoundly altered; the machine gun contrasted with the bow and arrow involves no larger a reconstruction than that of the mental life required by the change from primitive to present-day situations.
The science of happiness is the most intricate of human pursuits. It is to this study that Dr. Wells makes a significant contribution. As a pioneer, he blazes his trail; oth-