Author of ‘The Master and His Emissary - The Divided Brain and The making Of The Western World’ and ‘The Divided Brain And The Search For Meaning’. Iain McGilchrist is committed to the idea that the mind and brain can be understood only by seeing them in the broadest possible context, that of the whole of our physical and spiritual existence and of the wider human culture in which they arise: the culture which helps to mould, and in turn is moulded by our minds and brains. He argues that the division of the brain into two hemispheres is essential to human existence, making possible incompatible versions of the world, with quite different priorities and values.