Walter Rauschenbusch (1861–1918) was a Christian theologian and Baptist pastor who taught at the Rochester Theological Seminary. Rauschenbusch was a key figure in the Social Gospel and 'Single Tax' movements that flourished in the United States during the late 19th and early 20th centuries.

Óscar Arnulfo Romero y Galdámez was a prelate of the Catholic Church in El Salvador, who served as the fourth Archbishop of San Salvador. He spoke out against poverty, social injustice, assassinations and torture.