The Master and His Emissary
Iain McGilchrist
 The 608 page book is divided into an introduction, two parts and a conclusion. In the introduction, McGilchrist states that "there is, literally, a world of difference between the [brain] hemispheres. Understanding quite what that is has involved a journey through many apparently unrelated areas: not just neurology and psychology, but philosophy, literature and the arts, and even, to some extent, archaeology and anthropology." In the first part, "The Divided Brain", McGilchrist describes the functioning of the left and right hemispheres of the brain and their respective and at times conflicting "world views". One of the core themes of the book is the importance of differentiation and integration, and of the integration of the two. In the second part, "How the Brain Has Shaped Our World", the author describes the evolution of Western culture, as influenced by hemispheric brain functioning, from the ancient world, through the Renaissance and Reformation; the Enlightenment; Romanticism and Industrial Revolution; to the modern and postmodern worlds which, to our detriment, are becoming increasingly dominated by the left brain.