Secular humanism is a humanist philosophy that upholds reason, ethics, and justice, and specifically rejects the supernatural and the spiritual as the basis of moral reflection and decision-making. Like other types of humanism, secular humanism is a life stance that focuses on the way human beings can lead good, happy and functional lives.

The term "secular humanism" was coined in the 20th century to make a clear distinction from "religious humanism". Secular humanism is also called "scientific humanism", because biologist Edward Wilson claimed it to be "the only worldview compatible with science's growing knowledge of the real world and the laws of nature".