This is the text of John C. Calhoun's last speech to the United States Senate, delivered on March 4, 1850, just weeks before his death. Unable to deliver it himself due to failing health, it was read on his behalf by Senator James Mason. "Address of the Hon. John C. Calhoun...on the Subject of Slavery" presents Calhoun's staunch defense of slavery and his arguments against the growing abolitionist movement. He articulates the Southern perspective on states' rights and the balance of power between the federal government and individual states, warning of the dire consequences of disrupting the existing social and political order. This address offers a crucial insight into the political and philosophical underpinnings of the pro-slavery movement in the lead-up to the Civil War. It remains a significant document for understanding the complex and contentious history of slavery in the United States. The speech also references Daniel Webster. 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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. 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. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. 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.