Atheism and naturalism versus Theism
Both are about one question: whether there is a God. Theism says yes, usually a person who made the world and cares about it. Atheism, in the sense philosophers prefer, says no.
What they share
Both are about the same question: whether there is a God, usually understood as a conscious, all-powerful, all-knowing and good being who is the source of everything else. The standard atheist arguments aim at that idea of God.
Where they differ
- Yes or no. Theism says there is a God. Atheism, in the sense philosophers prefer, says there is not. A person may reject every God, or only a certain idea of God, such as one who is all-powerful and perfectly good.
- The reasons. Atheists point to the problem of evil, to divine hiddenness (if God wanted people to believe, the evidence would be clearer), to clashes between the traditional attributes of God, and to natural explanations from cosmology and evolution that leave less for a God to do. Defenders of belief, such as Richard Swinburne, argue that the evidence for God is stronger than atheists say.
- The world. For theists the world depends on God for its existence, and God is present and active in it. Many atheists also hold naturalism, the view that reality is nature and contains nothing supernatural, though atheism alone does not require it.
A question that separates them
- Is there a God? “There is a God who knows us and cares what we do” against “There is no God who cares”.
- What is the world? “Everything that exists is part of nature” against “The world depends on something beyond it”.
The two are opposites on one question only. Neither view settles how a person should live.
Written by epchē in our own words, and checked against independent sources on 1 October 2026. The sources are listed below.
Read each on its own
Sources we used
- Atheism · Internet Encyclopedia of Philosophy, read on 1 October 2026
- Atheism and Agnosticism · Stanford Encyclopedia of Philosophy, read on 1 October 2026
- Monotheism · Stanford Encyclopedia of Philosophy, read on 1 October 2026
- Theism · New World Encyclopedia, read on 1 October 2026