Scientific Naturalism is the view that the universe, its characteristics, and its behaviors are to be investigated and understood in purely naturalistic terms. Everything that exists and everything that occurs is part of the natural universe and is subject to examination. Scientific Naturalism assumes that the universe is a closed system where all events occur for naturalistic reasons and that there cannot be anything or anyone from outside that system that acts upon it. Therefore, Scientific Naturalism excludes the possibility of the supernatural and God as an explanation for any phenomena.