At the end of the twentieth century, it might seem that questions about the nature of the mind are best left to scientists. However, as this Oxford Reader makes clear, the arguments of philosophers throughout history still provide essential insights into contemporary questions about the mind and help to clarify the underlying scientific assumptions. Contributions from thinkers ranging from Plato and Locke to Roger Penrose and Oliver Sacks show that appreciating the full complexity of debates about consciousness, intelligence, and perception demands attention to fundamental questions that have occupied philosophers for over two thousand years.