This book guides readers through an investigation of religion from a naturalistic perspective and explores the very meaning of the term 'religious naturalism'. Oppy considers several widely disputed claims: that there cannot be naturalistic religion; that there is nothing in science that poses any problems for naturalism; that there is nothing in religion that poses any serious challenges to naturalism; and that there is a very strong case for thinking that naturalism defeats religion. Naturalism and Religion: A Contemporary Philosophical Investigation is an ideal introduction for undergraduate and postgraduate students of religious studies and philosophy who want to gain an understanding of the key themes and claims of naturalism from a religious and philosophical perspective.