The founding fathers were worried about the government holding too much power over the people, so they wrote in that there will be separate branches of government. Each with their own powers and limitations
"King Philip’s War — also known as the First Indian War, the Great Narragansett War or Metacom’s Rebellion — took place in southern New England from 1675 to 1676. It was the Native Americans' last-ditch effort to avoid recognizing English authority and stop English settlement on their native lands. The war is named after the Wampanoag chief Metacom, later known as Philip or King Philip, who led the fourteen-month bloody rebellion."