Relevant scripture: 2 Peter 1:19
atheism – “disbelief or lack of belief in the existence of God or gods. This found at Google: atheism.” This found at Google: atheism.
naturalism – “a philosophical viewpoint according to which everything arises from natural properties and causes, and supernatural or spiritual explanations are excluded or discounted.” This found at Google: naturalism.
philosophical naturalism – “the doctrine that the natural world is all there is. It is also called metaphysical naturalism and ontological naturalism.” See this and more at Conservapedia: Philosophical naturalism.
methodological naturalism – “a strategy for studying the world, by which scientists choose not to consider supernatural causes – even as a remote possibility.” See this and more at Conservapedia – Methodological naturalism.
secularism – “a belief system that rejects religion, or the belief that religion should not be part of the affairs of the state or part of public education. The principles of separation of church and state and of keeping religion out of the public school system are an example of secularism.” Found at YourDictionary.com: secularism.
scientism – “belief in the universal applicability of the scientific method and approach, and the view that empirical science constitutes the most “authoritative” worldview or the most valuable part of human learning – to the exclusion of other viewpoints.” This and more found at Wikipedia: Scientism.
polytheism – “the belief in or worship of more than one god.” Found at Google: polytheism. Polytheism dominated the thinking of antiquity, but holds no sway in modernity. I include it in this post only for making that point that “darkness” as defined by the Scriptures took different form in biblical times than we see it taking since.