Oil had mainly been used for lighting lamps and was not very cheap. After John Rockefeller became an oil tycoon, the price of oil was nearly cut in half because it was easy to find and also to manufacture. Almost every home in America would soon have the luxury of having lights and fuel for their homes. The production of oil also developed and the oil could now be made into many different products such as, kerosene, crude oil, and gasoline. The easy extraction and manufacture process also made oil go down in price.
The Railroad was also a large contributing factor of the expansion of the country. On top of the foundation for oil, the railroad thrived. It was now possible for goods and people to travel from New York to LA in less than a week. It helped spur larger more spread out cities and towns and during the civil war helped to end it. Andrew Carnegie was the man mostly responsible for this amazing feat across the country. Carnegie was one of the largest steel producers in the world. He was responsible for building the tracks that would shape the nation. Along with the discovery of oil it was possible to take it to different parts of the country for use.
One of the other main contributions to the American Revolution was the immigration of thousands upon thousands of migrant workers from other countries. This helped spur the expansion of industry by making labor cheaper and the work