What was the most technological change during the market revolution?

Americans integrated the technologies of the Industrial Revolution into a new commercial economy. Steam power, the technology that moved steamboats and railroads, fueled the rise of American industry by powering mills and sparking new national transportation networks. A “market revolution” remade the nation.

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war never

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."