Final answer:
Montesquieu favored the English system due to its separation of powers, which prevented any single part of the government from becoming too powerful, a principle that shaped the U.S. Constitution.
Step-by-step explanation:
Montesquieu thought that the English system had the best form of government due to its separation of powers. This system divided the powers of government into the legislative, executive, and judicial branches, to prevent any single entity from gaining too much control. Montesquieu's ideas greatly influenced the Founding Fathers when they were framing the United States Constitution. They were intent on creating a government that would prevent the corruption associated with concentrated power, which could lead to forms such as tyranny, oligarchy, or mobocracy.
In an oligarchy, a small group of elite people hold political power, which is different from Montesquieu's principles of separation of powers. Furthermore, after the American Revolution, the revolutionaries established a republic, moving away from monarchy, the initial British system from which they gained independence.