Thomas Reid (1710-96) was a contemporary of both David Hume and Immanuel Kant, and a central figure in the Scottish School of Common Sense. Until recently, his work has been largely neglected, and often misunderstood. Like Kant, Reid cited Hume¿s Treatise as the main spur to his own philosophical work. In Reid¿s case, this led him to challenge `the theory of ideas¿, which he saw as the cornerstone of Hume¿s (and many other philosophers¿) theories. This volume explores topics ranging from perception, to epistemology, to ethics and meta-ethics, through to language, mind, and metaphysics. This book was originally published as a special issue of the Canadian Journal of Philosophy.