Cromwell was an inexperienced MP in the 1640, from the beginning a politician unafraid to challenge the established order. He was critic of the bishops and called for the established Church to be pulled up “roots and branches” His victories gave him the confidence and motivation to intervene in, and to shape, political events. He promoted men on the basis of their ability and character rather than social status, upsetting some generals.
Whilst Lord Protector of England, the government administration under Cromwell was the most efficient it had ever been in England. He insisted on standards of honesty and efficiency. Judges, in particular, were required to be diligent and fair. He changed the way judges were appointed, so that good men filled these important posts. He did not tolerate intolerance.
https://www.youtube.com/watch?v=RkAbOGxDF6g
https://www.youtube.com/watch?v=WiIrmItm-YE
https://www.youtube.com/watch?v=Xz1XORmNP2M
https://www.youtube.com/watch?v=fjuHqNmPZSI
The details by David Starkey; foremost constitutional historian