History of England

The English complained, not of the law, but of the violation of the law. They rose up against the first magistrate merely in order to assert the supremacy of the law. - Thomas Babington Macaulay History of England

That in a nutshell tries to explain why Oliver Cromwell was able to come to power in England while in Scotland the people still supported the King (aka "first magistrate"). 

Not sure if I buy that explanation.