All Souls, a member of the Unitarian Universalist Association of Congregations, describes its theology as having evolved from a liberal Christian tradition into a "rich pluralism."

Davies became nationally prominent for his progressive views, advocating civil rights for African-Americans and women, desegregation, and for keeping control of nuclear weapons in civilian hands.

On the evening of September 11, 2001, All Souls and its newly called senior minister, Robert M. Hardies, held a memorial service which was covered by National Public Radio.

Soon thereafter, All Souls hosted a public memorial service for Joseph Curseen Jr. and Thomas Morris Jr., two local postal workers who died from anthrax exposure.

Hardies was shown speaking against the Federal Marriage Amendment in a clip from a National Press Club news conference on CNN's The Situation Room.

Black Flag vocalist Henry Rollins was critical of the fan behavior at the concert, later remarking ruefully that "All Souls had this beautiful marble bathroom—it took some breaking!

"[8] Several notable bands from the Washington, D.C. punk community performed in concert at All Souls, such as Fugazi, Jawbox, Shudder to Think,[9] Nation of Ulysses, Fidelity Jones, and Swiz.

Hilda Mason, former D.C. mayor Marion Barry, mezzosoprano Denyce Graves, and Sweet Honey in the Rock member Ysaye Maria Barnwell.