Final answer:
Andrew Carnegie sought to control all aspects of steel production, using vertical integration to dominate the industry and cut costs. He did not just want to launch a railroad; he aimed to own mines and railroads, which led to the formation of the United States Steel Corporation by J.P. Morgan after Carnegie sold his business.
Step-by-step explanation:
Andrew Carnegie was instrumental in the expansion and modernization of the American steel industry. His approach was to control every aspect of production, a strategy known as vertical integration. To this end, Carnegie did not merely want to launch Scott's railroad; rather, he pursued the ownership of all related businesses, including mines, railroads, and other transportation arteries, to ensure that he could produce and distribute steel at a lower cost and higher efficiency than his competitors. This enabled Carnegie Steel to dominate the market and later positioned Carnegie as a philanthropist, using his wealth to fund various charitable causes after selling his company to J.P. Morgan, who formed the United States Steel Corporation.