By Samuel Marinus Zwemer an American missionary, traveler, and scholar. Nicknamed The Apostle to Islam, Zwemer was the founder the Moslem World, a missionary periodical, and served as its editor for thirty-five years. His literally heritage numbers over fifty religious books and hundreds of articles. “The Influence of Animism on Islam” was published in 1920, and dealt with the doctrine of spiritual beings, including human souls, animism, and its workings in Islamic practice. All the great world religions show traces of animism in their sub-soil and none but Christianity (even that not completely) has uprooted the weed-growth of superstition. In this book it is our purpose to show how Islam sprang up in Pagan soil and retained many old Arabian beliefs in spite of its vigorous monotheism.