The foregoing considerations are enough, perhaps, to make one wonder whether, after all, Western civilization may not be about to follow its unnumbered predecessors into decay and dissolution. There can be no doubt that such a suspicion is oppressing many thoughtful minds at the present time. It is not likely to be dispelled by the contemplation of history or by the nature of recent events. Indeed, the view can be maintained very plausibly that all civilizations must tend ultimately to break down, that they reach sooner or later a period when their original vigour is worn out, and then collapse through internal disruption or outside pressure. It is even believed by some that Western civilization already shows the evidences of decline which in its predecessors have been the forerunners of destruction. When we remember that our very short period of recorded history includes the dissolution of civilizations so elaborate as those of the Chaldeans, the Assyrians, the Egyptians, and of the Incas, that a social structure so complex as that but lately disclosed in Crete could leave no trace in human {242} memory but a faint and dubious whisper of tradition, and that the dawn of history finds civilization already old, we can scarcely resist the conclusion that social life has, more often than one can bear to contemplate, swung laboriously up to a meaningless apogee and then lapsed again into darkness. We know enough of man to be aware that each of these unnumbered upward movements must have been infinitely painful, must have been at least as fruitful of torture, oppression, and anguish as the ones of which we know the history, and yet each was no more than the swing of a pendulum and a mere fruitless oscillation landing man once more at his starting point, impoverished and broken, with perhaps more often than not no transmissible vestige of his greatness. If we limit our view to the historical scale of time and the exclusively human outlook, we seem almost forced to accept the dreadful hypothesis that in the very structure and substance of all human constructive social efforts there is embodied a principle of death, that there is no progressive impulse but must become fatigued, that the intellect can provide no permanent defence against a vigorous barbarism, that social complexity is necessarily weaker than social simplicity, and that fineness of moral fibre must in the long run succumb to the primitive and coarse. Let us consider, however, what comments may be made on this hypothesis in view of the biological conceptions of man which have been put forward in this book. At the same time an opportunity is afforded to put in a more continuous form the view of society that has necessarily been touched on so far in an interrupted and incidental way.