The “Covenanters” were the first political movement of note to preach that the only legitimate government is one that rules with the consent of the people.
Their idea of who “the people” whose consent was required was much more limited than in the modern sense, but still, considering they were surrounded by a world that mostly was was run by monarchies supposedly empowered by God himself, it was the first step in the right direction.
As the MacDonalds say, never trust a Campbell.
Nigel Tranter wrote two books about him that I enjoyed reading as a young person. He wrote many more, including the Robert the Bruce trilogy.
A coat of arms described in a NY genealogy book attributed him as the grandfather of James Graham (1656-1700), the Attorney-General of the Province of New York and my eighth great grandfather. His daughter Isabella married NJ Governor Lewis Morris, my 7th. Morris also co-wrote the first play in the colonies.
On a genealogical trip, I happened across his papers at Rutgers and the librarian pointed at the xerox machine and handed me ALL of the Lewis Morris handwritten papers. I whispered to husband that our travel plans had just changed. Spent 3 days copying EVERYTHING.