There are many reasons for the rapid industrialization of the United States in the late 1800s. One factor was the large number of workers in our country. Due to increasing immigration to the United States, factories owners had a surplus of workers from which to hire. They needed a large supply of workers who would work for low pay. Since many of these immigrants were unskilled workers, this pool of workers existed. Another factor, which aided this industrial growth, was the availability of many natural resources. For example, we had lots of coal that was necessary to power machines. There was also a growing demand for products. As our country grew and expanded, people wanted more products. Industries developed to meet this growing demand. Finally, with access to rivers and oceans, and with the growth of railroads, businesses could ship products more easily. All of these factors created an environment for businesses to become very profitable.