This book tells the story of Pope Urban II and his role in launching the First Crusade. It provides a detailed account of the political, social, and religious context of the time, and explores the reasons behind the Crusade's success and ultimate failure. Drawing on a wide range of historical sources, including letters, chronicles, and other contemporary accounts, this book offers a fascinating and insightful analysis of one of the most consequential events in European history. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.