It has even developed and become civilised inspite of them. This is true, but unfortunately as part of his development man has enormously increased his power over nature. He has learned to tap the hidden forces of our planet and use them for his purpose. Now, if his purposes are those of destruction, each fresh advance in his mastery of nature only increases the danger from war, as men learn to destroy one another in ever great numbers, from ever great distances, and in ever more varied and ingenious ways.