From the International Humanist and Ethical Union’s Minimum Statement on Humanism:
“Humanism is a democratic and ethical life stance, which affirms that human beings have the right and responsibility to give meaning and shape to their own lives. It stands for the building of a more humane society through an ethic based on human and other natural values in the spirit of reason and free inquiry through human capabilities. It is not theistic, and it does not accept supernatural views of reality.”
Humanists seek to build responsible and ethical communities.
For more information, see The International Humanist and Ethical Union