This vintage book contains two of Arthur Schopenhauer's seminal philosophical texts; 'On The Fourfold Root Of The Principle Of Sufficient Reason' and 'On The Will In Nature'. Within these two essays, Schopenhauer provides the foundation that underpins his ideas - a necessary basis for appreciating the entirety of his work. The essays were first published in his doctoral dissertation in 1813, and this 1889 edition represents its first English translation. This book constitutes a worthy addition to any bookshelf, and is a must-read for students of philosophy and those with an interest in Schopenhauer. The chapters include: 'General Survey Of The Most Important Views Hitherto Held Concerning The Principle Of Sufficient Reason', 'Insufficiency Of The Old And Outlines Of A New Demonstration', 'On The First Class Of Objects For The Subject', 'And That Form Of The Principle Of Sufficient Reason Which Predominates In It', etcetera. This text is being republished now in an affordable, modern edition complete with a specially commissioned biography of Arthur Schopenhauer.