Our world to-day draws upon relatively immense accumulations of knowledge of fact. In the age of Pericles scarcely the first stone of our comparatively tremendous cairn of things recorded and proved had been put in place. When we reflect upon this difference, then it ceases to be remarkable that the Greeks, with all their aptitude for political speculation, were blind to the insecurities of their civilization from without and from within, to the necessity for effective unification, to the swift rush of events that was to end for long ages these first brief freedoms of the human mind. It is not in the results it achieved, but in the attempts it made that the true value for us of this group of Greek talkers and writers lies. It is not that they answered questions, but that they dared to ask them. Never before had man challenged his world and the way of life to which he found his birth had brought him. Never had he said before that he could alter his conditions. Tradition and a seeming necessity had held him to life as he had found it grown up about his tribe since time immemorial. Hitherto he had taken the world as children still take the homes and habits in which they have been reared. So in the fifth and fourth centuries B.C. we perceive, most plainly in Judea and in Athens, but by no means confined to those centres, the beginnings of a moral and an intellectual process in mankind, an appeal to righteousness and an appeal to the truth from the passions and confusions and immediate appearances of existence. It is like the dawn of the sense of responsibility in a youth, who suddenly discovers that life is neither easy nor aimless. Mankind is growing up. The rest of history for three and twenty centuries is threaded with the spreading out and development and interaction and the clearer and more effective statement of these main leading ideas. Slowly more and more men apprehend the reality of human brotherhood, the needlessness of wars and cruelties and oppression, the possibilities of a common purpose for the whole of our kind. In every generation thereafter there is the evidence of men seeking for that better order to which they feel our world must come. But everywhere and wherever in any man the great constructive ideas have taken hold, the hot greeds, the jealousies, the suspicions and impatience that are in the nature of every one of us, war against the struggle towards greater and broader purposes. The last twenty-three centuries of history are like the efforts of some impulsive, hasty immortal to think clearly and live rightly. Blunder follows blunder; promising beginnings end in grotesque disappointments; streams of living water are poisoned by the cup that conveys them to the thirsty lips of mankind. But the hope of men rises again at last after every disaster....