And, save in eastern Europe, it is to-day advancing along all its far-flung frontiers. Its most signal victories are being won among the negro races of central Africa, and this phase will be discussed in the next chapter, but elsewhere the same conditions, in lesser degree, prevail. Every Moslem is a born missionary and instinctively propagates his faith among his non-Moslem neighbors. The quality of this missionary temper has been well analyzed by Meredith Townsend. "All the emotions which impel a Christian to proselytize," he writes, "are in a Mussulman strengthened by all the motives which impel a political leader and all the motives which sway a recruiting sergeant, until proselytism has become a passion, which, whenever success seems practicable, and especially success on a large scale, develops in the quietest Mussulman a fury of ardor which induces him to break down every obstacle, his own strongest prejudices included, rather than stand for an instant in the neophyte's way. He welcomes him as a son, and whatever his own lineage, and whether the convert be negro, or Chinaman, or Indian, or even European, he will without hesitation or scruple give him his own child in marriage, and admit him fully, frankly, and finally into the most exclusive circle in the world."[41] Such is the vast and growing body of Islam, to-day seeking to weld its forces into a higher unity for the combined objectives of spiritual revival and political emancipation. This unitary movement is known as "Pan-Islamism." Most Western observers seem to think that Pan-Islamism centres in the "Caliphate," and European writers to-day hopefully discuss whether the Caliphate's retention by the discredited Turkish Sultans, its transferrence to the rulers of the new Arab Hedjaz Kingdom, or its total suppression, will best clip Islam's wings.