The British Government was taxation without representation so they started to rebel against it, which eventually led to the revolutionary war
The Constitution. Checks and balances throughout, separation of power in article one two and three.
After the disaster in Lisbon, Shay was furious with the plans of the Colonial branch of the Assassin Brotherhood. So he became a templar and devoted his career to hunting down artifacts and his former associates.His travels brought him to New York, the Appalachian mountains, among other locations.