The development that can be supported in this detail of the history of the U.S. economy is a steep increase in business profits due to government contracts.
The search for economic gain by European settlers in the 17th and 18th centuries is the origin of the modern U.S. economy. After that, the New World's economy developed from a mediocre colonial economy to a modest, autonomous agrarian economy and, finally, to a highly complex industrial economy.
It is based on the idea that agriculture was expanded into new areas as a result of the construction of canals and the use of steamboats in the West.
The government-created contracts provide the private sector with a number of potential profit-boosting projects that they can undertake. An illustration of such a contract would be something like a contract to assist the government in inventing a new technology or in building a bridge.
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