Why did the influence of puritanism increase under Cromwell?

The influence of Puritanism increased under Oliver Cromwell due to his alignment with its values and the rise of the Parliamentarian cause during the English Civil War. Cromwell, as a leader of the New Model Army and later as Lord Protector, promoted a governance that aligned with Puritan ideals, emphasizing religious reform, moral discipline, and a more personal interpretation of faith. The weakening of the monarchy and the established Church of England allowed Puritans to gain more political and social power, leading to the implementation of policies that reflected their beliefs. This environment fostered the growth of Puritan communities and their influence on English society during Cromwell's rule.