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The Pacific Railway Act provided federal subsidies to promote the construction of a transcontinental railroad across the United States.

This helped the evolution of America from an agrarian to an urban by giving the railroad the right of way on public lands. Also it provided for the construction of a transcontinental railway system.

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To help develop the American West and spur economic growth, Congress passed the Homestead Act of 1862, which provided 160 acres of federal land to anyone who agreed to farm the land. The act distributed millions of acres of western land to individual settlers.

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Bonanza farms were made to help small farmers succeed and get on track with the economy. The Bonanza farms were large and helped farmers connect to the growing economy.

The bonanza farms helped the evolution of America by helping the development of farm technology and economics. This helped the advancement of farm technology across the United States.

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Thomas A. Edison who was an inventor wanted to commercialize an electric power grid. He employed skilled machinists and scientist to help him create an electric power system. Then the invention that made him famous was the incandescent light bulb.

This electric company helped advance the evolution of America from agrarian to urban because it was the power system that helped bring the world electric light, recorded music, and the movies, among other things

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Andrew Carnegie was a self-made entrepreneur in the steel industry who is responsible for many philanthropic works.

Andrew Carnegie helped the evolution of America from an agrarian to an urban by helping build the formidable American steel industry. He produced the steel to make machinery and transportation possible throughout the nation.