Is philosophy capable of establishing truths scientifically? If not, what can it do? What is its standing and what are its credentials? Is philosophy an essential element in humane study? Can philosophy establish anything at all? Philosophy asks questions about all areas of experience, but what about philosophy itself? In 2007–8, The Royal Institute of Philosophy, in its annual lecture series, asked distinguished philosophers to reflect on the nature, scope and possibility of philosophy. Contributors include Peter van Inwagen, Stephen Clark, John Cottingham, P. M. S. Hacker, Michela Massimi, Stephen Mullhall, Herman Philipse and Bryan Magel.