National Council of Churches in the context of "Peace churches"

The mainline Protestants (sometimes also known as oldline Protestants) are a group of Protestant denominations in the United States and Canada largely of the theologically liberal or theologically progressive persuasion that contrast in history and practice with the largely theologically conservative evangelical, fundamentalist, charismatic, confessional, Confessing Movement, historically Black church, and Global South Protestant denominations and congregations. Some make a distinction between "mainline" and "oldline", with the former referring only to denominational ties and the latter referring to church lineage, prestige and influence. However, this distinction has largely been lost to history and the terms are now nearly synonymous.

Mainline Protestant churches have stressed social justice and personal salvation and, both politically and theologically, tend to be more liberal than non-mainline Protestant churches. Mainline Protestant churches share a common approach that often leads to collaboration in organizations such as the National Council of Churches, and because of their involvement with the ecumenical movement, they are sometimes given the alternative label of ecumenical Protestantism (especially outside the United States). While in 1970 the mainline Protestant churches claimed most Protestants and more than 30 percent of the American population as members, as of 2009 they were a minority among American Protestants, claiming approximately 15 percent of American adults. In 2024, approximately 13.1% of Americans were white non-Hispanic mainline Protestants according to the Public Religion Research Institute's Census of American Religion.

The Reformed Church in America (RCA) is a mainline Reformed Protestant denomination in Canada and the United States. It has about 82,865 members. From its beginning in 1628 until 1819, it was the North American branch of the Dutch Reformed Church. In 2024, Pew Research estimated that approximately 0.1% of the US adult population, or about 260,000 people, self-identifies with the Reformed Church in America.

The RCA is a founding member of the National Council of Churches, the World Council of Churches (WCC), Christian Churches Together, and the World Communion of Reformed Churches (WCRC). Some parts of the denomination belong to the National Association of Evangelicals, the Canadian Council of Churches, and the Evangelical Fellowship of Canada. The denomination is in full communion with the Evangelical Lutheran Church in America, Presbyterian Church (USA), and United Church of Christ and is a denominational partner of the Christian Reformed Church in North America.

Jeffrey Gros FSC (7 January 1938 – 12 August 2013) was an American Catholic ecumenist and theologian. A member of the De La Salle Christian Brothers, Gros had served as a high school history teacher, university professor, associate director of the Secretariat for Ecumenical and Interreligious Affairs at the United States Conference of Catholic Bishops; director of Faith and Order for the National Council of Churches; and president of the Society for Pentecostal Studies. He is the author or editor of over 20 books, 310 articles, and an uncounted number of book reviews. He died of pancreatic cancer in Chicago, IL, on 12 August 2013 at the age of 75.

The Christian Church (Disciples of Christ) is a mainline Protestant Christian denomination in the United States and Canada. The denomination started with the Restoration Movement during the Second Great Awakening, first existing during the 19th century as a loose association of churches working toward Christian unity. These slowly structuralized through missionary societies, regional associations, and an international convention. In 1968, the Disciples of Christ officially adopted a denominational structure. At that time, a group of churches left in order to remain nondenominational.

The denomination is referred to by several versions of its full name, including "Disciples of Christ", "Disciples", "Christian Church", "CC(DOC)", and "DOC". The Christian Church was a charter participant in the formation of the World Council of Churches (WCC) and of the Federal Council of Churches (now the National Council of Churches), and it continues to be engaged in ecumenical conversations.

The New Revised Standard Version (NRSV) is a translation of the Bible in American English. First published in 1989 by the National Council of Churches, the NRSV was created by an ecumenical committee of scholars "comprising about thirty members". The NRSV is considered a revision of the Revised Standard Version, and relies on recently published critical editions of the original Hebrew, Aramaic, and Greek texts. It is thus a revision in a series of English translations that has been identified as beginning with the Tyndale Bible. A major revision of the NRSV, the New Revised Standard Version Updated Edition (NRSVue), was released in 2021.

Used broadly among biblical scholars, the NRSV was intended as a translation to serve the devotional, liturgical, and scholarly needs of the broadest possible range of Christian religious adherents.