While the pursuit of philosophy "of" studies--of science, of art, of politics--has blossomed, the philosophy of philosophy remains a comparatively neglected domain. In this book, Nicholas Rescher fills this gap by offering a study in methodology aimed at providing a clear view of the scope and limits of philosophical inquiry. He argues that philosophy's inability to resolve all of the problems of the field does not preclude the prospect of achieving a satisfactory resolution of many or even most of them.