Westminster Assembly in the context of "Long Parliament"

The Puritans were English Protestants in the 16th and 17th centuries who sought to rid the Church of England of what they considered to be Roman Catholic practices, maintaining that the Church of England had not been fully reformed and should become more Protestant. Puritanism played a significant role in English and early American history, especially in the Protectorate in Great Britain, and the earlier settlement of New England.

Puritans were dissatisfied with the limited extent of the English Reformation and with the Church of England's toleration of certain practices associated with the Catholic Church. They formed and identified with various religious groups advocating greater purity of worship and doctrine, as well as personal and corporate piety. Puritans adopted a covenant theology, and in that sense they were Calvinists (as were many of their earlier opponents). In church polity, Puritans were divided between supporters of episcopal, presbyterian, and congregational types. Some believed a uniform reform of the established church was called for to create a godly nation, while others advocated separation from, or the end of, any established state church entirely in favour of autonomous gathered churches, called-out from the world. These Separatist and Independents became more prominent in the 1640s, when the supporters of a presbyterian polity in the Westminster Assembly were unable to forge a new English national church.

Under Charles I, the Puritans became a political force as well as a religious tendency in the country. Opponents of the royal prerogative became allies of Puritan reformers, who saw the Church of England moving in a direction opposite to what they wanted, and objected to increased Catholic influence both at Court and (as they saw it) within the Church.

After the First English Civil War political power was held by various factions of Puritans. The trials and executions of William Laud and then King Charles were decisive moves shaping British history. While in the short term Puritan power was consolidated by the Parliamentary armed forces and Oliver Cromwell, in the same years, the argument for theocracy failed to convince enough of the various groupings, and there was no Puritan religious settlement to match Cromwell's gradual assumption of dictatorial powers. The distinctive formulation of Reformed theology in the Westminster Assembly would prove to be its lasting legacy.

The Westminster Confession of Faith, or simply the Westminster Confession, is a Reformed confession of faith. Drawn up by the 1646 Westminster Assembly as part of the Westminster Standards to be a confession of the Church of England, it became and remains the "subordinate standard" of doctrine in the Church of Scotland and has been influential within Presbyterian churches worldwide.

In 1643, the English Parliament called upon "learned, godly and judicious Divines" to meet at Westminster Abbey in order to provide advice on issues of worship, doctrine, government and discipline of the Church of England. Their meetings, over a period of five years, produced the confession of faith, as well as a Larger Catechism and a Shorter Catechism. For more than three hundred years, various churches around the world have adopted the confession and the catechisms as their standards of doctrine, subordinate to the Bible. For the Church of Scotland and the various denominations which spring from it directly, though, only the Confession and not the Catechisms is the subordinate standard, the Catechisms not being re-legislated in 1690.