Evangelicalism

What is evangelicalism?

Evangelicalism is a Protestant Christian movement characterized by four core commitments, first systematized by historian David Bebbington in what is now called the “Bebbington Quadrilateral.” These four marks distinguish evangelical Christianity from other forms of Protestantism and from cultural Christianity more broadly.

Scale and demographics

Evangelicalism is the largest religious grouping in the United States. According to the Pew Research Center, roughly a quarter of American adults identify as evangelical or born-again Christians — somewhere between 70 and 90 million people, depending on how the category is defined. It is not a single denomination but a trans-denominational movement spanning Baptist, Pentecostal, non-denominational, and many other church traditions. The Southern Baptist Convention, with approximately 13 million members, is the largest evangelical denomination in the country.

Globally, evangelicalism is growing rapidly in sub-Saharan Africa, Latin America, and parts of Asia — even as it shrinks in the United States and Western Europe. The center of gravity of world Christianity is shifting southward, and the theologically conservative, experientially intense form of faith associated with evangelicalism is leading that growth.

Political influence in the United States

No religious movement has had a greater impact on American politics over the past fifty years than white evangelical Christianity. Beginning with Jerry Falwell Sr.’s Moral Majority in 1979, evangelical leaders built a political infrastructure that became the base of the Republican Party. The issues driving this alliance — abortion, school prayer, opposition to the Equal Rights Amendment, and later opposition to same-sex marriage — were framed explicitly in religious terms.

In the 2016 and 2020 presidential elections, roughly 81% of white evangelical voters supported Donald Trump, a figure that surprised many outside observers but reflected the degree to which evangelical identity had fused with a particular political coalition. The alliance has generated significant internal debate: critics within evangelicalism argue that the movement traded its prophetic independence for political access, and that the cost has been its credibility with younger generations.

Evangelicalism’s political influence is not limited to elections. The network of evangelical advocacy organizations, Christian law firms, politically active megachurches, and evangelical media has shaped legislation, judicial appointments, and policy debates on reproductive rights, LGBTQ+ protections, religious exemptions, and public education. Understanding American politics requires understanding evangelical Christianity.

Biblical inerrancy and its consequences

The doctrine of biblical inerrancy — that the Bible is without error in all that it affirms — is a defining feature of conservative evangelicalism and a source of recurring tension with science, history, and ethics. When the findings of geology, evolutionary biology, cosmology, or archaeology conflict with a literal reading of scripture, inerrancy requires either rejecting the scientific finding or developing elaborate harmonization strategies.

This produces specific flashpoints: young-earth creationism (the belief that the Earth is approximately six thousand years old), opposition to the scientific consensus on evolution, and resistance to LGBTQ+ equality on the grounds that biblical prohibitions are clear and binding. Evangelicals who accept evolution or affirm same-sex relationships often find themselves marginalized within their own communities, accused of “compromising” scripture rather than interpreting it.

Cultural Christianity versus evangelical identity

There is a meaningful distinction between evangelical identity as a theological commitment and what is sometimes called “cultural Christianity” — a loose affiliation with Christian tradition, holidays, and values without the specific doctrinal commitments the Bebbington Quadrilateral describes. Many Americans who describe themselves as Christians do not attend church regularly, have not had a born-again experience, and hold views on science, politics, and social issues that diverge sharply from evangelical orthodoxy.

The conflation of these two groups produces misleading statistics. When surveys report that two-thirds of Americans are Christian, they are including both committed evangelicals who attend church weekly, tithe, and organize their lives around their faith — and people who checked “Christian” because they were baptized as infants and celebrate Christmas. These are very different relationships to religion, with very different implications for politics, social attitudes, and susceptibility to religious doubt.

The deconversion wave

Younger evangelicals are leaving the faith at historically high rates. The proportion of Americans under 30 who identify as religiously unaffiliated has risen from roughly 12% in the early 1990s to over 40% in recent surveys. Many of those leaving come from evangelical backgrounds — the very communities that invested most heavily in youth programs, Christian schools, and summer camps.

The reasons cited in exit surveys and memoirs are consistent: a sense that the church was not honest about intellectual difficulties with its truth claims; the perception that evangelical culture prioritized political power over moral integrity; experiences of harm around purity culture, gender roles, and LGBTQ+ exclusion; and the basic availability of alternative information online. The internet has done to evangelical gatekeeping what the printing press did to the medieval Church — made it impossible to control what people read.

Many who leave do not become atheists immediately. They pass through stages — from evangelical to “spiritual but not religious,” to agnostic, to secular — often over years. The deconversion literature from evangelical backgrounds is now a substantial genre, and communities of former evangelicals are among the most active on platforms like Reddit and YouTube.