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What Is Kingdom Christianity?

Living under Jesus’ kingship now — the faith of the church before Constantine

Kingdom Christianity treats the kingdom of God as a present reality: Jesus is King now, the Sermon on the Mount is the law of his kingdom, and the church is a colony of heaven whose allegiance transcends every nation. It is how the early church lived for three centuries — and what the Anabaptists recovered at the cost of martyrdom.

By · The Historic Faith · Updated September 2026

When Jesus began to preach, Matthew summarizes his message in one phrase: the gospel of the kingdom. His first followers took him at his word. They understood themselves to be citizens of a real kingdom with a real King, a real law, and a real way of life — one that made them strangers in every empire and at home in none. The second-century Epistle to Diognetus put it plainly: Christians “dwell on earth, but are citizens of heaven.”

“Kingdom Christianity” is the modern name for that ancient faith. The label spread through the conservative-Anabaptist renewal of recent decades — above all through David Bercot’s book The Kingdom That Turned the World Upside Down and his recorded teaching, and through gatherings like Kingdom Fellowship Weekend and the Strength to Strength network. But the faith it names has a traceable lineage: the pre-Nicene church lived it for three centuries; medieval movements like the Waldensians kept it alive through Christendom; the Anabaptists recovered it wholesale in 1525; and their heirs carry it today.

It is also not the same thing as academic “kingdom theology.” Inaugurated-eschatology frameworks discuss when the kingdom comes; Kingdom Christianity is about obeying the King who already reigns — the difference between a doctrine of the kingdom and an allegiance to it (see the FAQ below).

Below are the seven convictions that define it — each with the primary sources and free courses where you can test every claim yourself.

Jesus is King now — not only in the future

The gospel Jesus preached was "the gospel of the kingdom" (Matthew 4:23). Kingdom Christians take that phrase at face value: the kingdom of God is not merely a future hope or a synonym for heaven, but a present reality that began at Christ's enthronement. To be converted is to change kingdoms — to transfer allegiance from every earthly power to the reigning King (Colossians 1:13).

The Sermon on the Mount is the kingdom's law

Every kingdom has a constitution. Kingdom Christians read Matthew 5–7 as exactly that: not an impossible ideal meant to drive us to grace, but the actual law of Christ's kingdom, meant to be obeyed — on oaths, on enemies, on money, on lust, on retaliation. This is how the church before Constantine read it, chapter by chapter.

Allegiance above every nation

Kingdom Christians hold citizenship in heaven (Philippians 3:20) and live in every earthly nation as resident aliens — praying for rulers, paying taxes, obeying law, but refusing to give any state the allegiance, violence, or oaths that belong to King Jesus alone. Patriotism, politics, and the sword belong to the kingdoms of this world.

Love of enemies and nonresistance

"Love your enemies" was the command the early church quoted more than almost any other. Kingdom Christians renounce violence entirely — in war, in self-defense, in litigation — not from pacifist political theory but from obedience to the King who overcame by a cross and told Pilate, "My kingdom is not of this world; if it were, my servants would fight."

Baptism as the oath of kingdom citizenship

Entrance into the kingdom is voluntary and personal: repentance, faith, and baptism as a believing adult — the moment a disciple swears fealty to the new King. That is why Kingdom Christians, like the early church and the Anabaptists, practice believer's baptism rather than baptizing infants who cannot yet choose a kingdom.

The church as a colony of heaven

The local church is the kingdom's embassy: a visible, disciplined, sharing community whose common life — economic generosity, mutual aid, truth-telling without oaths, holy living — demonstrates what the King's reign looks like. The second-century Epistle to Diognetus described Christians as people who "dwell on earth, but are citizens of heaven."

The kingdom before Constantine

For three centuries the church lived exactly this way — a transnational kingdom people who would die for the King but never kill for Caesar. When Constantine fused church and empire in AD 313, kingdom Christianity gave way to Christendom. Kingdom Christians read the Ante-Nicene fathers because that pre-Constantinian church is the model, and the Anabaptists of 1525 because they recovered it at the cost of martyrdom.

Learn Kingdom Christianity — free courses

Every course below is free, with full video, audio, and transcripts.

Christian Citizenship — David Bercot on living first as a citizen of the kingdom of God.

Radical Reformation History — Dean Taylor on how the Anabaptists recovered the kingdom, from the early church to today.

The Myth of Christian America — American history through kingdom eyes.

The Sermon on the Mount, verse by verse — what the early church fathers taught on Matthew 5–7, from the primary sources.

Watch: the Kingdom Christian movement today

Kingdom Fellowship Weekend — the annual gathering of kingdom-minded believers; full sessions free.

Kingdom Fellowship West — the west-coast gathering.

Strength to Strength — talks and testimonies from across the kingdom Christian network, including journeys into kingdom faith from every background.

Anabaptist Perspectives — conversations on kingdom convictions and Anabaptist life.

Frequently asked questions

What is Kingdom Christianity?

Kingdom Christianity is a way of following Jesus that treats his kingdom as a present reality, not only a future hope. Its core convictions: Jesus is King now; the Sermon on the Mount is the law of his kingdom, meant to be obeyed; the church is a colony of heaven whose allegiance transcends every nation; entrance is by voluntary faith and believer's baptism; and the King's people renounce violence entirely. It is the faith of the church before Constantine, recovered by the Anabaptists in 1525.

Is Kingdom Christianity a denomination?

No. Kingdom Christianity is not a denomination or an organization but a set of convictions about the kingdom of God that cuts across church labels. It is most at home among conservative Anabaptists (Mennonite, Amish-background, Hutterite, and independent kingdom-minded congregations), but it also describes many converts and house fellowships with no Anabaptist heritage who have embraced the kingdom vision of the early church.

Where does the term "Kingdom Christianity" come from?

The idea is as old as the gospel — Jesus' own message was "the gospel of the kingdom." As a modern label, it was popularized in the conservative-Anabaptist renewal of recent decades, especially through David Bercot's book The Kingdom That Turned the World Upside Down and his recorded teaching, and through gatherings like Kingdom Fellowship Weekend and the Strength to Strength network that connect kingdom-minded believers across denominational lines.

How is Kingdom Christianity related to Anabaptism?

Anabaptism is the historical movement (born 1525) that recovered kingdom convictions after Christendom; Kingdom Christianity is the theological heart of what they recovered. Most Kingdom Christians hold historic Anabaptist convictions — believer's baptism, nonresistance, separation from the state — but the term deliberately reaches wider than ethnicity or denomination: it names the kingdom vision itself, which any follower of Jesus can embrace.

How is Kingdom Christianity different from mainstream evangelicalism?

The difference is the kingdom's location in time and the Sermon on the Mount's authority. Mainstream evangelicalism tends to treat the kingdom as future (or as a synonym for personal salvation) and reads the Sermon on the Mount as an ideal pointing to grace. Kingdom Christianity holds that the kingdom began at Christ's enthronement and that the Sermon is present-tense law for the King's people — which produces visibly different lives: nonresistance instead of just war, kingdom allegiance instead of Christian nationalism, and churches that function as disciplined communities rather than voluntary audiences.

What do Kingdom Christians believe about war and politics?

Kingdom Christians renounce warfare and lethal violence entirely, following the early church's consistent refusal of military service and Jesus' command to love enemies. Toward the state they practice respectful non-participation: honoring rulers, paying taxes, and obeying law wherever it does not conflict with the King — but declining the sword, the oath of office, and typically the ballot, because the church's calling is to be a witness-nation within every nation, not a faction within any of them.

What is a Kingdom Christian?

A Kingdom Christian is a follower of Jesus who has transferred citizenship to Christ's present kingdom: baptized on personal faith, obedient to the Sermon on the Mount as the kingdom's law, nonresistant toward enemies, and holding allegiance to King Jesus above every nation, party, and flag. The term describes a conviction, not a membership — Kingdom Christians are found among conservative Anabaptists, independent congregations, and converts from every background.

Is Kingdom Christianity the same as "kingdom theology"?

No. "Kingdom theology" (also called inaugurated eschatology or "already/not-yet") is an academic framework about the timing of God's kingdom, held by many evangelical and charismatic theologians who still embrace just-war doctrine and political engagement. Kingdom Christianity is a lived allegiance: it draws the practical conclusions — nonresistance, no oaths, kingdom-first loyalty, believer's baptism — that the early church actually drew from Christ's present kingship. Many hold kingdom theology on paper; Kingdom Christians stake their lives on it.

Where should I start exploring Kingdom Christianity?

Start with the free Christian Citizenship course by David Bercot, which lays out the kingdom as the early Christians understood it. Then read the Sermon on the Mount alongside the early church's own commentary in our free Sermon on the Mount library, and watch the Kingdom Fellowship Weekend talks. If the history grips you, Dean Taylor's Radical Reformation History course tells how the Anabaptists recovered the kingdom at the cost of their lives.

About this page. Early-church citations can be read in full context in our complete Ante-Nicene library. Edited by Dean Taylor for The Historic Faith. Suggest a correction.