Humanist groups and other humanist sites. Most organizations listed are associated with the International Humanist and Ethical Union (IHEU). Humanist groups associated with the Humanist Movement (Siloist) are listed in a subcategory of their own, and are not associated with the IHEU. Theistic and Christian humanists have their own categories. Explicitly religious humanist and explicitly secular humanist sites should be put in the appropriate subcategory.