In The Sleepwalkers and The Act of Creation Arthur Koestler provided pioneering studies of scientific discovery and artistic inspiration, the twin pinnacles of human achievement. The Ghost in the Machine looks at the dark side of the coin: our terrible urge to self-destruction... Could the human species be a gigantic evolutionary mistake? To answer that startling question Koestler examines how experts on evolution and psychology all too often write about people with an 'antiquated slot-machine model based on the naively mechanistic world-view of the nineteenth century. His brilliant polemic helped to instigate a major revolution in the life sciences, yet its 'glimpses of an alternative world-view' form only the background to an even more challenging analysis of the human predicament. Perhaps, he suggests, we are a species in which ancient and recent brain structures - or reason and emotion - are not fully co-ordinated. Such in-built deficiencies may explain the paranoia, violence and insanity that are central strands of human history. And however disturbing we find such issues, Koestler contends, it is only when we face our limitations head-on that we can hope to find a remedy.

Culture and Cultural Entities provides an original philosophical analysis of the nature and explanation of cultural phenomena, with special attention to ontology and methodology. It addresses in depth such topics as: the relation between physical and biological nature and cultural phenomena; the analysis of intentionality; the nature and explanation of action; causality; causal explanation and the unity of science; theories of language; historicity; animal and human intelligence; psychological and social phenomena; technology and evolution. Its approach features a form of non-reductive materialism, examines a wide range of views, and is highly readable, making it suitable for professionals, advanced undergraduate and graduate students, and an informed general audience. A new chapter was added to give a sense of pertinent trends since the appearance of the first edition, particularly with respect to the history of philosophy, pragmatism, the unity of science, and evolution. The unity, scope, and simplicity of the theory are well-regarded.

Two major works have been written within the framework of Integral Wisdom about the nature of Self and God. While they share important features, namely the evolutionary context of the conversation and a vision of Self beyond Ego, their interior visions of the quality of the Self beyond Ego are profoundly different. Both of these visions of Self-or key dimensions of the two versions-have been adopted, directly and indirectly by many spiritual teachers. In this clear and compelling work Marc Gafni articulates the two models, their shared features, their differences and why-as we seek to articulate an Integral Wisdom-these differences matter so desperately.