Which long-term change did the American Revolution bring to what is now the United
States?

The Revolution opened new markets and new trade relationships. The Americans' victory also opened the western territories for invasion and settlement, which created new domestic markets. Americans began to create their own manufacturers, no longer content to reply to those in Britain.

Explanation:

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i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.