Atheism and naturalism versus Secular humanism
Atheism is one claim: there is no God. Secular humanism is a whole outlook that builds an ethics on that footing. Every secular humanist is godless, but most atheists are not humanists.
What they share
Both say there is no God, and both take a natural, not supernatural, view of the world.
Where they differ
- One claim or a whole outlook. Atheism is defined narrowly as the claim that God does not exist, and by itself it carries no ethics or world view. Secular humanism adds a positive ethics: people can and should lead good lives and work for the good of humanity, without a God, using reason and experience.
- What follows. So every secular humanist is an atheist, or at least godless, but most atheists are not humanists. The difference is not about God. It is about whether a person also holds that human wellbeing and shared responsibility are what ethics is built on.
A question that separates them
Ask about ethics, not about God.
- What do we owe each other? “Without a God, we still owe it to each other to work for the good of humanity” against “Not believing in God says nothing about how anyone should live”.
The first answer is the humanist's. The second is what an atheist can say without adding anything beyond atheism.
Written by epchē in our own words, and checked against independent sources on 2 October 2026. The sources are listed below.
Read each on its own
Sources we used
- Atheism and Agnosticism · Stanford Encyclopedia of Philosophy, read on 2 October 2026
- Secular Humanism Defined · Free Inquiry (Center for Inquiry), read on 2 October 2026
- Humanism · Encyclopedia.com, read on 2 October 2026