This is, of course, a bit mystical. Broad Naturalism Naturalism is broadly accepted in the academic world today, and is typically advocated by people who admire science, and perhaps have a training in science. Naturalism is that everything which exists is a part from nature, and that nothing supernatural does exist. A naturalist typically believes that science has shown that all ancient belief systems are superstitious. Human civilization has shown progression, and our theory of the world today is far better than the theories you find earlier parts of history as well as in non-western cultures.
Naturalists typically believe that science is the source of true understanding of reality.
One reason why we should accept science, is that science emphasizes experience, and represents as systematic analysis of what experience may tell us about reality. In the university world today, perhaps especially in the US, many academics accept that science gives us the truth about reality. However, naturalism is a faith like most other belief systems. Naturalists place great emphasis on experience, but experience never told that there cannot be anything else than that which experience shows you. Also, naturalists seem to rely on a false principle, i.e. the principle that if something hasn't been experienced it cannot exist.