Tom Clark is founder and director of the Center For Naturalism, a non profit advocacy organization in the Boston area devoted to educating the public about naturalism, policy development, and community building. He is the editor of the popular online website, Naturalism.Org, which is among the web's most comprehensive resources on scientific naturalism, its implications and its applications. He is also the author of Encountering Naturalism. In this discussion with D.J. Grothe, Tom Clark explores the differences between methodological naturalism and scientific / philosophical / metaphysical naturalism. He also talks about some of the implications of naturalism for society's beliefs about religion, the paranormal, and concepts like free-will. He also explores how naturalism can help foster a sense of secular spirituality among those who adopt its worldview.