[1] His father, Charles R. Eberhardt, S.T.M., Ph.D., was an Episcopal minister, as well as chair of the Department of Philosophy at Towson State University, and earlier a professor at Davidson College.

On his mother's side Eberhardt is related to Joseph Smith, prophet-founder of the Church of Jesus Christ of Latter-Day Saints.

[4] Although he grew up Episcopalian on what he called "the hard pews of the church," he does not practice it in adulthood, saying he comes closest spiritually to Zen and Sufism, and the Catholic Worker Movement.

[7] He additionally cites the unofficial national anthem of England, "Jerusalem" (And did those feet in ancient time), a choral song by Sir Hubert Parry.

With CORE, the Congress of Racial Equality, he authored The Soul Book, with photographs by Carl X. Eberhardt began in the peace movement in 1964, and was a draft counselor for the American Friends Service Committee (AFSC).

Father Berrigan celebrated Eberhardt's marriage to Louise Yolton on October 16, 1967, the night before the actions of The Baltimore Four.

[9] As a peace protester, on October 17, 1967, Eberhardt entered the Selective Service Board at Baltimore's Customs House with Father Philip Berrigan, Tom Lewis, and a United Church of Christ pastor, Rev.

While they were out on bond, Berrigan invited Eberhardt to participate in that action, but he declined, as did Jesuit priest Richard McSorley SJ.

The FBI captured Berrigan and Eberhardt on the Upper West Side of Manhattan on April 21, 1970, when they raided St. Gregory the Great Church's parish rectory and found them hidden in a pastoral closet.

[21] He worked at the Baltimore City Detention Center, (the jail), assisted at the beginning by then-warden Gordon Kamka and Charles Benton, Finance Director for Mayor William Donald Schaefer.