Coup d'etat, the Hundred Days, and the Battle of Waterloo
The Magna Carta established the basis for representative democracy as it was the first attempt after the fall of the classical Graeco-Roman era of a form of parliament, where nobles would meet to deliberate the course of society,and advise the kings on policy issues. It was a paradigm shift from the absolute politics and power structures of dark Europe, forming to inspire future government discussions in England and USA.
The people residing in those states would decide.