Answer:
They wanted to guard against tyranny which results from one person or group of persons having too much power
Step-by-step explanation:
The American founding fathers went to such great lengths to make available checks and balances, separation of powers, and federalism to control power was to guard against tyranny if power becomes invested in one man or group of persons.
They realised the danger of excess power and made ways to control that power so a leader would not turn to a tyrant.