He was an opponent of King [[Charles I]] and a leading spokesman for [[Oliver Cromwell]]. In politics he advocated [[republicanism]] and a form of [[Libertarianism]]. Kings were not needed to make a nation, he argued, because it was the virtue of the people that mattered: | He was an opponent of King [[Charles I]] and a leading spokesman for [[Oliver Cromwell]]. In politics he advocated [[republicanism]] and a form of [[Libertarianism]]. Kings were not needed to make a nation, he argued, because it was the virtue of the people that mattered: |