God." Moslem tradition calls him the Liar (_al-Kadhdháb_), and represents him as an obscene miracle-monger, which can hardly be the whole truth. It is possible that he got some of his doctrines from Christianity, as Professor Margoliouth has suggested,[344] but we know too little about them to arrive at any conclusion. After a desperate struggle Musaylima was defeated and slain by 'the Sword of Allah,' Khálid b. Walíd. The Moslem arms were everywhere victorious. Arabia bowed in sullen submission. [Sidenote: Islam a world-religion.] [Sidenote: Conquest of Persia and Syria (633-643 A.D.).] [Sidenote: Moslem toleration.] Although Muir and other biographers of Muḥammad have argued that Islam was originally designed for the Arabs alone, and made no claim to universal acceptance, their assertion is contradicted by the unequivocal testimony of the Koran itself. In one of the oldest Revelations (lxviii, 51-52), we read: "_It wanteth little but that the unbelievers dash thee to the ground with their looks_ (of anger) _when they hear the Warning_ (_i.e._, the Koran); _and they say, 'He is assuredly mad': but it_ (the Koran) _is no other than a_ WARNING UNTO ALL CREATURES" (_dhikrun li ’l-‘álamín_).[345] The time had now come when this splendid dream was to be, in large measure, fulfilled. The great wars of conquest were inspired by the Prophet's missionary zeal and justified by his example. Pious duty coincided with reasons of state. "It was certainly good policy to turn the recently subdued tribes of the wilderness towards an external aim in which they might at once satisfy their lust for booty on a grand scale, maintain their warlike feeling, and strengthen themselves in their attachment to the new faith."[346] The story of their achievements cannot be set down here. Suffice it to say that within twelve years after the Prophet's death the Persian Empire had been reduced to a tributary province, and Syria, together with Egypt, torn away from Byzantine rule. It must not be supposed that the followers of Zoroaster and Christ in these countries were forcibly converted to Islam. Thousands embraced it of free will, impelled by various motives which we have no space to enumerate; those who clung to the religion in which they had been brought up secured protection and toleration by payment of a capitation-tax (_jizya_).[347] [Sidenote: The Caliph ‘Umar (634-644 A.D.).]