Theology in Wartime: The Westminster Assembly and the English Civil War

The Westminster Confession of Faith was not written in a university library or a quiet cathedral chapter house. It was drafted between 1643 and 1649, in the middle of the English Civil War — while the nation that commissioned it was literally at war with its own king.

Parliament Versus the Crown

By 1642, tensions between King Charles I and the English Parliament over religion, taxation, and the limits of royal authority had escalated into open armed conflict. Parliament, needing both military and political support, turned to Scotland — a nation with its own strong Presbyterian, Reformed church tradition — and in 1643 the two parties signed the Solemn League and Covenant, an agreement in which Parliament committed, among other things, to reforming the English church along lines more compatible with Scottish Presbyterianism, in exchange for Scottish military assistance against the king.

That political and military bargain is the direct reason the Westminster Assembly existed at all. Parliament summoned a body of theologians — the Westminster Assembly, made up of clergy and a smaller number of lay members, along with Scottish commissioners present in an advisory role — to reshape the doctrine, worship, and government of the English church, with the civil war raging around them for most of the Assembly's active years.

Working While the Country Burned

The Assembly met, remarkably, in continuous session for years, producing not only the Confession of Faith but also the Larger and Shorter Catechisms and a Directory for Public Worship — an extraordinary body of theological work, carried out by men who were, in many cases, directly affected by the war unfolding around them. Some members had relatives fighting on opposing sides. London itself, where the Assembly met at Westminster Abbey, was firmly under Parliamentary control, but the war's fortunes shifted repeatedly across the years the Assembly worked, and its members had no guarantee, especially in the earlier years, which side would ultimately prevail.

The Confession itself, completed in 1646 and formally adopted with minor revisions by 1647, reflects a theology of remarkable comprehensiveness and precision — covering everything from the nature of Scripture to providence, free will, justification, the sacraments, and civil government — the work, in other words, of men determined to build something durable and complete, even as the political and military situation around them remained entirely unresolved.

An Outcome the Authors Didn't Fully Get

Here the story takes an ironic turn. Parliament's forces, under figures like Oliver Cromwell, did ultimately defeat the Royalist cause — Charles I was tried and executed in January 1649, an almost unthinkable outcome by the standards of the era, and England briefly became a republic. But the religious settlement the Westminster Assembly had worked to build was never fully or permanently established in England itself. The Assembly's confession found its most lasting home not in England, where the political and religious landscape kept shifting through the Commonwealth, the Restoration of the monarchy in 1660, and beyond, but in Scotland and, later, in Presbyterian churches that spread across the English-speaking world, especially in North America.

A Confession Forged, Not Composed at Leisure

It's worth sitting with the contrast this creates alongside other Reformation-era confessions: the Heidelberg Catechism, written under its own kind of political precarity a century earlier, or the Belgic Confession, born of direct persecution in the Low Countries. Westminster's authors worked not under the threat of persecution for their faith, but in the middle of an active civil war whose outcome would determine which government, if any, would ultimately enforce or abandon the very confession they were writing. That the Assembly produced a document of such lasting theological substance under those conditions — one that continues to shape Presbyterian and Reformed churches around the world nearly four centuries later — says something about how seriously its authors took the task of getting the church's confession right, regardless of how uncertain everything else around them had become.

Westminster stands today as one of the crowning achievements of how Westminster fits into the wider international Reformed confessional family, alongside the earlier confessions of the continental Reformation — proof that some of the church's most enduring theological work has been done not in peace, but in the middle of the storm.

Explore the wider Reformed family: the Heidelberg Catechism, the Belgic Confession, and how these confessions relate to one another.