Secular Humanism is a secular philosophy that espouses reason, ethics, and justice, and specifically rejects supernatural and religious dogma as the basis of morality and decision-making. Secular Humanism is a life stance that focuses on the way human beings can lead good, happy and functional lives.

Secular Humanism (capital "H") is distinguished from various other humanisms. Though Secular Humanism posits that human beings are capable of being ethical and moral without religion, or God, that is not to say it assumes humans to be inherently or innately good. Nor does it present humans as "above nature" or superior to it; by contrast, the Humanist life stance emphasises the unique responsibility facing humanity and the consequences of our ethical decisions.

The term "Secular Humanism" was coined in the 20th century, and was adopted by non-religious humanists in order to make a clear distinction from "religious humanism". Secular Humanism is also called "scientific humanism". Biologist E. O. Wilson claimed it to be "the only worldview compatible with science's growing knowledge of the real world and the laws of nature".

Fundamental to the concept of secular humanism is the strongly held belief that ideology--be it religious or political--must be examined by each individual and not simply accepted on faith. Along with this belief, an essential part of secular humanism is an ongoing search for objective truth, which is seen to be continually adapting and changing.