Conservative Christianity in the context of "Union of Utrecht (Old Catholic)"

The Social Gospel is a social movement within Protestantism that aims to apply Christian ethics to social problems, especially issues of social justice such as economic inequality, poverty, alcoholism, crime, racial tensions, slums, unclean environment, child labor, lack of unionization, poor schools, and the dangers of war. It was most prominent in the early 20th-century United States and Canada.

Theologically, proponents of the movement emphasized living out the line from the Lord's Prayer (Matthew 6:10): 'Thy kingdom come, Thy will be done on earth as it is in heaven,' interpreting it as a call to address societal injustices. They typically were postmillennialist and believed the Second Coming could not happen until humankind rid itself of social evils by human effort. The Social Gospel was more popular among clergy than churches. Its leaders were predominantly associated with the liberal wing of the progressive movement and most were theologically liberal, although a few were also conservative when it came to their views on social issues. Washington Gladden and Walter Rauschenbusch were the two major founders of the movement.

The American Baptist Churches USA, abbreviated as ABCUSA, is a mainline Protestant denomination in the United States, and part of the Baptist tradition. The American Baptist Churches is the reorganization from 1907 of the Triennial Convention, established in 1814. It is rooted in the early English and Welsh Baptist settlers in America, especially with the foundation of Rhode Island Colony, tracing its history to the First Baptist Church in America, established by Roger Williams in 1638. The Triennial Convention became the Northern Baptist Convention in 1907, which was renamed as the American Baptist Convention from 1950 to 1972. The ABCUSA headquarters is located in King of Prussia, Pennsylvania. The American Baptist Churches cooperates with the Baptist World Alliance, the Baptist Joint Committee, and the World Council of Churches.

Although the denomination is considered mainline Protestant, one of the Seven Sisters of American Protestantism, varying theological and missional emphases may be found among its congregations, including evangelical, conservative, and charismatic orientations. In 2025, Pew Research Center published the Religious Landscape Survey, estimating that 1 percent of US adults, or 2.6 million people, self-identify as adherents of the American Baptist Churches USA.

Confessional Lutheranism is a name used by Lutherans to designate those who believe in the doctrines taught in the Book of Concord of 1580 (the Lutheran confessional documents) in their entirety. Confessional Lutherans maintain that faithfulness to the Book of Concord, which is a summary of the teachings found in Christian scripture, requires attention to how that faith is actually being preached, taught, and put into practice. Confessional Lutherans believe that this is a vital part of their identity as Lutherans.

The term "Confessional Lutheran" is generally used among more conservative churches found in organizations like the International Lutheran Council (ILC), Confessional Evangelical Lutheran Conference (CELC), and the Global Confessional and Missional Lutheran Forum, though other Confessional Lutheran denominations are independent of the same. Confessional denominations subscribe to the Book of Concord because (quia) it agrees with the Bible. In contrast, churches of the larger Lutheran World Federation subscribe to the Book of Concord as an exposition of faith insofar as (quatenus) it agrees with the Christian Bible.

The Evangelical left is a Christian left movement in evangelical Christianity that affirms conservative evangelical theology and are politically progressive. It is mainly based in the US, but is also found in Latin America.

The Presbyterian Church (USA), abbreviated PCUSA, is a mainline Protestant denomination in the United States. It is the largest Presbyterian denomination in the United States. Its theological roots lie primarily in the Scottish Reformation, particularly going back to the reforms done by the Calvinist reformer and minister John Knox of Scotland. Now known for its generally liberal stance on doctrine, The Presbyterian Church (USA) was established with the 1983 merger of the Presbyterian Church in the United States, whose churches were located in the Southern and border states, with the United Presbyterian Church in the United States of America, whose congregations could be found in every state.

The church maintains a Book of Confessions, a collection of historic and contemporary creeds and catechisms, including its own Brief Statement of Faith. It is a member of the World Communion of Reformed Churches. The similarly named Presbyterian Church in America (PCA) is a separate denomination whose congregations can also trace their history to the various schisms and mergers of Presbyterian churches in the United States. Unlike the more conservative Presbyterian Church in America, the Presbyterian Church (USA) supports the ordination of women and affirms same-sex marriages. It also welcomes practicing gay and lesbian persons to serve in leadership positions as ministers, deacons, elders, and trustees.

The Confessing Movement is a largely lay-led theologically conservative Christian movement that opposes the influence of theological liberalism and theological progressivism currently within several mainline Protestant denominations and seeks to return those denominations to its view of orthodox doctrine or to form new denominations and disfellowship them if the situation becomes untenable. While those aligned with the Confessing Movement seek to retake Mainline Christian denominations, there are those in the Confessing Movement who eventually deem dealing with theological liberalism within their denominations as not being tenable anymore and would later join or start Confessional churches that continue with the traditions of their respective denominations and maintaining evangelical-orthodox doctrine while being ecclesiastically separate from the Mainline Protestant denominations. Youth aligned with the Confessing Movement have viewed their project as being an 'Operation Reconquista', specifically with respect to seeking to establish theological orthodoxy within Mainline Christian denominations.

It overlaps with other conservative Christian movements including Evangelicalism, and within Methodism specifically, the Holiness movement. Its members have stated their commitment to work to change their home denominations from within rather than establishing new ones, even if they are unable to regain full influence. It also has overlaps with Confessionalism which is identified with the belief in the importance of full and unambiguous assent to the whole of a religious movements' or denominations' teachings such as those found in Confessions of Faith which they see as accurate summaries of the teachings found in Scripture and accurately shows their distinction from other groups. Confessionalism is most visible among Lutherans known as Confessional Lutherans for their adherence to the Book of Concord. The Confessing Movement places particular weight on the role of evangelism and traditional Bible teachings concerning the deity of Christ and holds conservative, historical Christian views on sexuality, especially homosexuality.