1640 to July 1642; the road to civil war
Following defeat in the first of the Bishops Wars, Charles recalled Parliament in April 1640; when the Short Parliament refused to vote taxes without concessions, he dissolved it after only three weeks. However, the humiliating terms imposed by the Scots after a second victory in 1640 forced him to hold fresh elections in November; Pym acted as unofficial leader of the opposition, with Hampden co-ordinating the different factions. Shortly after the Long Parliament assembled, it was presented with the Root and Branch petition; signed by 15,000 Londoners, it demanded England follow the Scottish example and expel bishops from the Church of England.
This reflected widespread concern over Arminianism in the Church of England, seen as evidence of pro-Catholic policies and confirmed by Charles making war on the Protestant Scots, but not assisting his nephew Charles Louis against the Catholic Emperor. Many feared he was about to sign an alliance with Spain, a view shared by the French and Venetian ambassadors; ending arbitrary rule was thus important for England and the European Protestant cause in general.
Since convention prevented direct attacks on Charles, the alternative was to prosecute his 'evil counsellors', showing even if he was above the law, his subordinates were not, and he could not protect them; the intention was to make others think twice about their actions. Laud was impeached in December 1640, and held in the Tower of London; the king's chief minister the Earl of Strafford, former Lord Deputy of Ireland and organiser of the 1640 Bishops War, was executed in May 1641.
The Commons also passed a series of constitutional reforms, including the Triennial Act 1640 (16 Cha. 1. c. 1), abolition of the Star Chamber, and an end to levying taxes without Parliament's consent. Voting as a block, the bishops ensured all these were rejected by the Lords. In June 1641, Parliament responded with the Bishops Exclusion Bill, which was rejected by the Lords. The outbreak of the Irish Rebellion in October brought matters to a head; both Charles and Parliament supported raising troops to suppress it, but neither trusted the other with their control.
The Grand Remonstrance was presented to Charles on 1 December 1641; unrest culminated in 23 to 29 December with widespread riots in Westminster, led by the London apprentices. Suggestions Parliamentary leaders helped organise these have not been proved, but it prevented bishops attending the Lords. On 30 December, John Williams, Archbishop of York and eleven other bishops, signed a complaint, disputing the legality of any laws passed by the Lords during their exclusion. Led by Denzil Holles, the Commons ruled this was an invitation for the king to dissolve Parliament, and all twelve were arrested for treason.
On 4 January, Charles tried to arrest the Five Members, including Hampden, Pym and Holles; after it failed, he left London, accompanied by Royalist MPs like Edward Hyde, and members of the Lords. This was a major tactical mistake, as it gave his opponents majorities in both houses. However, even at this late stage, the vast majority on both sides wanted to avoid civil war, and petitioned Parliament and Charles to agree terms.
Pym and Hampden were among the few to understand only military victory could compel Charles to keep his commitments. He openly told foreign ambassadors any concessions were temporary, and would be retrieved by force if needed, an approach confirmed by the Scottish experience. The Irish Catholic rebels claimed approval for their actions; while untrue, the assertion was given weight by his attempts to use Irish troops against the Scots, and initial refusal to condemn the rebellion.
However, regardless of religion or political belief, in 1642 the vast majority believed a 'well-ordered' monarchy was divinely mandated; where they disagreed was what 'well-ordered' meant, and who held ultimate authority in clerical affairs. Since Charles could not be deposed, the only way of dealing with him was through military victory; it was this clarity that set Hampden, Pym, and later Oliver Cromwell apart from the majority. When the First English Civil War began, Hampden was appointed to the Committee of Safety.