The Richard Dawkins Foundation for Reason and Science supports “the scientific education, critical thinking and evidence-based understanding of the natural world in the quest to overcome religious fundamentalism, superstition, intolerance and human suffering.” The U.S. branch has headquarters in Washington, D.C., and is led by executive director R. Elisabeth Cornwell.

Project Reason is a nonprofit foundation dedicated to promoting secular values and scientific knowledge. Sam Harris is co-founder and chairman. Contact through the website.

The Institute for the Study of Secularism in Society and Culture strives to foster understanding of the role of secular values and the process of secularization in today’s society. The nonpartisan, multidisciplinary institute is based at Trinity College in Hartford, Conn., and is part of the college’s Program on Public Values. Barry Kosmin is director.

The Humanist Society certifies humanist celebrants. It’s based in Washington, D.C. Sarah Ameigh is communications and policy assistant.

The Humanist Institute explores humanist values and trains future leaders. Its seminars are held primarily in New York City and Washington, D.C. Kendyl R. Gibbons and Carol Wintermute are co-deans of the institute. Contact through the website.

FreeThoughtAction aims to spread the message of rational thought through billboards and other means and thereby grow the ranks of the freethought community.

The Center for Inquiry works to foster a secular society devoted to humanist values and freedom of inquiry. Its public education programs focus on paranormal and fringe science claims; religion, ethics and society; and medicine and health. The center is based in Amherst, New York, and has branches throughout the U.S. and the world. Robyn […]

Camp Quest was established in 1996 as the first residential summer camp in the U.S. aimed at children from freethinking families. Amanda Metskas is executive director.

The American Ethical Union espouses “deed before creed.” It neither affirms nor denies a belief in God and has no set theology or doctrines about life’s mysteries. Bart Worden is executive director.