50 Reasons People Give for Believing in a God is a 2008 book by journalist Guy P. Harrison which examines fifty common reasons that believers across the world give for believing in a god or gods.

The American Association for the Advancement of Atheism was an atheistic and antireligious organization established in 1925. It was founded by Charles Lee Smith, and the organization's "only creedal requirement was a formal profession of atheism".

Atheist Manifesto: The Case Against Christianity, Judaism, and Islam is a 2005 book by French author Michel Onfray. According to Onfray, the term "athéologie" is taken from a project of a series of books written and compiled by Georges Bataille under the vocable La Somme athéologique, which was ultimately never completed.

The Brights movement is a social movement whose members since 2003 refer to themselves as Brights and have a worldview of philosophical naturalism.

The Cult of Reason was France's first established state-sponsored secular religion, intended as a replacement for Catholicism during the French Revolution. After holding sway for barely a year, in 1794 it was officially replaced by the rival Cult of the Supreme Being, promoted by Robespierre. Both cults were officially banned in 1802 by Napoleon Bonaparte with his Law on Cults of 18 Germinal, Year X.

The End of Faith: Religion, Terror, and the Future of Reason is a 2004 book by Sam Harris, concerning organized religion, the clash between religious faith and rational thought, and the problem of intolerance that correlates with religious fundamentalism.

The God Delusion is a 2006 book by British evolutionary biologist, ethologist Richard Dawkins, a professorial fellow at New College, Oxford and, at the time of publication, the Charles Simonyi Chair for the Public Understanding of Science at the University of Oxford.

God Is Not Great is a 2007 book by British-American author and journalist Christopher Hitchens, in which he makes a case against organized religion. It was originally published in the United Kingdom by Atlantic Books as God Is Not Great: The Case Against Religion and in the United States by Twelve as God Is Not Great: How Religion Poisons Everything, but was republished by Atlantic Books in 2017 with no subtitle.

Islam and the Future of Tolerance: A Dialogue is a 2015 book collaboration between American author Sam Harris and British activist Maajid Nawaz. The book has been subsequently adapted into a documentary film of the same title.

The Portable Atheist: Essential Readings for the Nonbeliever (2007) is an anthology of atheist and agnostic thought edited by Christopher Hitchens.