The great fault of modern education has been that, with all its advanced methods of training children, it has missed what is most important: namely the lesson of unselfishness. Man thinks that an unselfish person is incapable of guarding his own interests in life; but however much it may appear so it is not so in reality. A selfish person is a disappointment to others, and in the end a disadvantage to himself. Mankind is interdependent, and the happiness of each depends upon the happiness of all, and it is this lesson that humanity has to learn today as the first and the last lesson.