A lot of that road had been traversed by the 1780s.
Not as much as you seem to think. There had been some limited inroads by democracy to that point, most notably the regicide of Charles I - and the reversion against a republic making Charles II the king.
King George III was happily kinging away along with his peer Charles XVI at the time.
Parliaments had secured some small rights, but was a far cry from the US model.
The US had the advantage of no royal linage to claim power, thus the need to elect an executive.
That didn't begin to stop them. European monarch had long had panels select new monarchs at times.
The rest of the system is similar in many respects, particularly the bill of rights which lifted heavily from the Magna Carta.
Not as much as you might think. Have you read the Magna Carta? It was little more than the result of the second-tier nobles increasng in power relative to the absolute monarch since the ablsolute monarchy of William the Conquerer in 1066. After the nobles ambushed him and forced his signature, he promptly withdrew his recognitiion of the document and it went back and forth, just a power play between the king and the nobles. It was very limited in any real protections for the people and far from the constitution.
Franklin also had little to do with the actual writing of the Constitution although he was a delegate.
While Madison is the primary author, it was based on collaboration and was hashed out in committee - on what do you base Franklin having little to say?
Do not attempt to chastise me for using the correct terminology after you claimed "democracy had a very ignoble history of failure in human history to that point" which clearly would not include republics (representative or otherwise).
I will, because I don't view it as either 'correct terminology' or anything but the red herring I said. It clearl *would* include republics - almost the only form of democracy ever attempted.
THe Democracy you claim had made such progress already in England was all of the 'republic' type, for example, strengthening the role of the parliament, not any 'direct democracy'.
This point just should be dropped, two exhanges is two too many.