Peace churches are Christian churches, groups or communities advocating Christian pacifism or Biblical nonresistance. The term historic peace churches refers specifically only to three church groups among pacifist churches:Church of the Brethren, including all daughter churches such as the Old German Baptist Brethren, Old Brethren and Dunkard Brethren; Religious Society of Friends (Quakers); and Mennonites, including the Amish, Beachy Amish, Old Order Mennonites, and Conservative Mennonites

Christian pacifism is the theological and ethical position according to which pacifism and non-violence have both a scriptural and rational basis for Christians, and affirms that any form of violence is incompatible with the Christian faith. Christian pacifists state that Jesus himself was a pacifist who taught and practiced pacifism and that his followers must do likewise. Notable Christian pacifists include Martin Luther King Jr., Leo Tolstoy, Adin Ballou, Dorothy Day, Ammon Hennacy, and brothers Daniel and Philip Berrigan.