If the Mohammedan had not practised tolerance at a time when this idea was unknown to the rest of Europe, there would now be idyllic peace in the Balkan States and in Asia Minor. Here it is the Christian who throws in the leaven of discord; and with the cruelty of a ruthlessly reacting power of nature, the otherwise humane Moslem rises and destroys the disturber of his peace.

The Foundations of the Nineteenth Century (Die Grundlagen des neunzehnten Jahrhunderts) (1899)