Thus then it appears from a glance at its history that this ideal of Universal Peace has stirred the imagination most deeply, first of all in the ages when an empire, whether Persian, Hebraic, Hellenic, or Roman, conterminous with earth, wide as the inhabited world, was still in appearance realizable; or, again, in periods of defeat, or of civil strife, as in the closing age of the Roman oligarchy; or in the moments of exhaustion following upon long-continued and desolating war, as in Modern Europe after the last phases of the Reformation conflict, the wars of Tilly and Wallenstein, of Marlborough and Eugène, and of Frederick. The familiar poetry in praise of peace, and the Utopias, the composition of which has amused the indolence of scholars or the leisure of statesmen, originate in such hours or in such moods. On the other hand, the criticism of war, scornful or ironic, of the great thinkers and speculative writers of modern times, when it is not merely the phantom of their logic, an _eidôlon specus_ created by their system, arises in the most impressive instances less from admiration or desire or hope of perpetual peace than from the arraignment of all life, and all the ideals, activities, and purposes of men. Hence the question whether war be a permanent condition of human life is answered by implication. For the history of the ideal of Universal Peace but re-enforces that definition of war set forth above, as a manifestation of the world-spirit, co-extensive with being, and as such, inseparable from man's life here and now. In all these great wars which we have touched upon, the conflict of two ideas, in the Platonic sense of the word, unveils itself, but both ideas are ultimately phases of one Idea. It is by conflict alone that life realizes itself. That is the be-all and end-all of life as such, of Being as such. From the least developed forms of structural or organic nature to the highest form in which the world-force realizes itself, the will and imagination of Man, this law is absolute. The very magic of the stars, their influence upon the human heart, derives something of its potency, one sometimes fancies, from the vast, the silent, mighty strife, the victorious energy, which brings their rays across the abysses and orbits of the worlds.