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Rh modern Germany has accommodated herself all too easily. For Germany, preserving full liberty in the world of thought, has trampled under foot liberty in the world of action, or at least has surrendered this liberty without ever a regret (Chapter Ten, passim).

These analyses of the German soul are of great interest to the psychologist, the historian, and the statesmen. But, since I am compelled to select, I shall choose for description those parts of the books which are addressed to everyone, which touch us all, which are truly universal. I shall speak of the general problem of war and peace in human evolution. I shall have to resign myself to yet further sacrifices. Ignoring the chapters which discuss this topic from a historical and from a literary point of view, I shall confine myself to the biological studies, for it is in these that the author's individuality finds its most original self-expression.

At grips with the hydra of war, Nicolai attacks the evil at the root. He opens with a vigorous analysis of instinct in general, for he is careful to avoid denying the innate character of war.

War, he says, is an instinct which springs from the deeps of mankind, an instinct which influences even those who condemn it. It is an intoxication which is carefully fostered in time of peace; when it breaks forth, it takes possession of all alike. But because it is an instinct, it does not follow that this instinct is sacred. Rousseau has popularised the idea that instinct is always good and trustworthy. Nothing of the kind. Instinct may be mistaken. When it is mistaken, the race dies out, and we can therefore easily understand that, in races which do not die out, instinct has a valid reason for existence. Nevertheless, an animal endowed with sound instincts,