Final answer:
The Decentralization Principle is the spreading of power within a democracy to prevent any one person or group from gaining too much control.
Step-by-step explanation:
The spreading of power to prevent any one person or group from gaining too much of it is known as the Decentralization Principle. This principle is an integral part of democratic systems, which aim to distribute authority broadly to prevent the rise of autocracy or oligarchy. The U.S. employs this through a system of checks and balances, ensuring no single branch of government can dominate the others. In contrast, autocracy and oligarchy represent the concentration of power in one or a few hands respectively, often leading to the erosion of democratic freedoms and inequalities.