I suggest that actual contrasts exist which may make it possible for a world-wide group mind to grow through the normal mode of group conflict and group imitation and co-operation. Perhaps we can attain race unity by envisaging the forces of nature as the rival group, conceiving the inroads of the insect world as the threat against human domination which must make us spring to arms in a sense of our common unity and our common nature. Perhaps we can conceive the national group as the contrasting element, and the international group mind as, not its enemy, but its synthesis. Finally, one all-inclusive mind actually does exist in the faith of most of the race—the ideal self of the group to which we give the name of God. The God-idea of the group is not the group itself, but is its outgrowth, its ideal self. Perhaps the future unity of mankind may come at last through a summation of its highest ideals and the rational toleration of diverse interpretations, different personalities, and widely contrasting group customs and manners. At present, however, an outstanding phenomenon of the group mind is intolerance, and through a study of intolerance we can perceive much of group nature and of the actual life of human societies. CHAPTER III. INTOLERANCE 1. Tolerance is the characteristic virtue of the modern era, just as intolerance has been typical of every age and almost every people in days gone by. Tolerance, we feel is the golden key which alone can open the door to the golden age. Tolerance is the one thing that can possibly wipe out the evils of hatred, warfare, and confusion, the age-old enemies of the progress of the race. When men and women learn tolerance for each other’s race, nationality, religion, and general attitudes, then they will be able to understand one another, and eventually to work with one another, even to love one another. Without that tolerance, we can never understand people of different race or religion or nationality, because we never even stop to look at them fairly and honestly. Certainly, without tolerance, co-operation, human sympathy, the brotherhood of man are empty words without possibility of realization.