Based on the materials, analyze how the natural environment, legal system and public sentiment have affected the American political system.

Analysis: This question examines the factors that formed the American political system and is answered from the perspective of geographical environment, legal system and public sentiment. That is to say, the United States is located in the North American continent, with no threats from powerful countries around it, rich natural resources, and a relatively good living environment. After the establishment of the Constitution in 1787, except for limited revisions, it has remained unchanged, thus maintaining the stability of the separation of powers. ; Most of the early immigrants to the United States came from Europe. They had a tradition of resisting autocracy and advocating freedom. Some thinkers, in particular, carried out long-term propaganda and practice of Enlightenment ideas.

Answer

Impact:

① (Natural environment perspective)

The United States is located in the North American continent, there are no strong national threats around it, and Rich in natural resources, the living environment is relatively good

② (Legal perspective)

After the constitution was formulated in 1787, it has remained unchanged except for limited revisions, thus maintaining the separation of powers. Stability of the political system

③ (Public sentiment perspective)

Most of the early immigrants to the United States came from Europe. They had a tradition of resisting autocracy and advocating freedom. In particular, some thinkers conducted long-term research on Enlightenment ideas. Advocacy and practice.