XLIII MUHAMMAD AND ISLAM A prophetic amateur of history surveying the world in the opening of the seventh century might have concluded very reasonably that it was only a question of a few centuries before the whole of Europe and Asia fell under Mongolian domination. There were no signs of order or union in Western Europe, and the Byzantine and Persian Empires were manifestly bent upon a mutual destruction. India also was divided and wasted. On the other hand China was a steadily expanding empire which probably at that time exceeded all Europe in population, and the Turkish people who