The Magical Carta was written because the king taxed citizens unfairly and it caused trouble with their economy. The Magna Carta took away power from the king saying that the king will not be able to give equal rights to men.
Tenant farming encouraged the rise of a new class of wealthy black farmers.
They haven't... They are still bound by the same constitution that previous presidents have.
After generations of being under the authority of a strong king, the authors feared a strong central government. Instead they wanted the states to have more power, so it, the power, was distributed into the hands of multiple people, not one (like a king). In fact, they didn't even have a chief executive (president). Hope that helps.
