This book is a philosophical inquiry into the nature of the self, based on a series of lectures delivered by Laird at the University of Edinburgh in 1914. Laird examines various theories of the self, including those of Descartes, Hume, and Kant, and offers his own view of the self as a relational entity that emerges through social interaction. The book is a seminal work in the field of philosophy of mind, and remains a valuable resource for scholars and students in the discipline. 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.