During the first stage of this revolution, the industrial and political changes were the most prominent. A change in the instrumentalities of life, physical, economic and political, occupied men's thoughts to a larger degree than ever before. But as the nineteenth century circled to the twentieth, deeper notes became audible. Humanitarianism, constructive reform, social democracy became the watchwords of the day. I do not think that it has yet been clearly realized how completely these new aims and interests fit in with the results of science and yet pass beyond them to the service of human values. The truth seems to be that, by an imperceptible process, new values and hopes have been replacing the traditional ones, and that these values and aims both find themselves in harmony with the new knowledge and rest upon it. In spite of the conflict between the rising view of man and nature and the traditional religious conception, there is yet, I believe, a profound continuity in the genuinely spiritual achievements of humanity. It is a pity to be so ridden by the new that the noble in the old is forgotten. Tenderness and love, however obscured at times by formalism and bigotry, owe much to their nurture by Christianity. Hence, the deeper and truer interpretation of all past movements regards them as varying expressions of humanity's growth in social and mental stature. There is, in other words, no real discontinuity in human history. The only difference is, that the dynamic of social conditions and intellectual heritage has varied. {6}