"The last century has witnessed an unprecedented development in the significance of education. One direct consequence has been an increased reverence for childhood. In this movement which has increased the dignity of children and schools, two large forces have been at work,--one social and the other scientific. The growth of the democratic spirit among men and institutions has made the education of children a public necessity, and lifted the school to a position of high social importance. The application of the theory of evolution to man and his life has revealed human infancy as one of the largest factors making for the superiority of man in the struggle for existence, and given to childhood a vast biological importance. .."