Puritans well, admirable in their strong beliefs, even when you disagree with them, like certain Calvinist groups (I'm Dutch). However under Cromwell they tried to mould society to their vision, we all know how that ended; .
With a shocking amount of personal religious tolerance, and the seeds for the mindset that would create the British Parliamentary system in place?
Just to make it clear, I'm as opposed to the bigoted declaration of Catholic ignorance as the next man, but the regularity with which Evil Calvinists are trotted out from the cornfield to terrify on this board is... well, a bit tiresome.