"Man is appealed to be guided in his acts, not merely by love, which is always personal, or at best tribal, but by his perception of his oneness with each human being. In the practice of mutual aid, which we can re-trace to the earliest beginnings of evolution, we thus find the positive and undoubted origin of our ethical conceptions; and we can affirm that in the ethical progress of man, mutual support- not mutual struggle- has had the leading part."