The King Center in Atlanta educates people about the life of Dr. Martin Luther King Jr., nonviolent conflict-reconciliation and social change.

Hampton University Ministers’ Conference in Hampton, Va. is the oldest nondenominational African-American ministers conference in the country. The organization works to address the concerns of the African American church and its relationships to the community.

Coalition of African-American Pastors is a Christian organization that works to promote the values of faith and family in U.S. communities.

The African American Ministers Leadership Council is a nonprofit organization under People for the American Way that celebrates the historical role of the Black Church as a stronghold in a history of oppression.

The African American Ministers in Action is a leadership program under People for the American Way. This program works to create justice and peace for struggling communities in the U.S. to create freedom and opportunity for all.

The Freethought Trail website traces west-central New York state’s pivotal role in the history of freethought. It is a project of the Council for Secular Humanism.

A Beliefnet excerpt from Susan Jacoby’s book Freethinkers: A History of American Secularism focuses on the so-called Golden Age of Freethought, a period during the late 19th and early 20th centuries when freethinkers’ ideas became more broadly disseminated in the U.S., thanks particularly to popular orators such as Robert Ingersoll.

Jonathan Miller explored the history of disbelief in a BBC series in 2005.

A chapter on the Atheist movement’s history is included in Gordon Stein’s 1980 book An Anthology of Atheism and Rationalism.