As America changed from a farming economy to an industrialized economy in the 19th century, those involved in big business and speculation began to make huge sums of money. Since local banks could no longer meet their needs, the United States, in cooperation with state banks, was forced to create a safe system of currency that would allow the fledgling economy to develop and expand. A centralized banking system grew, answering the financial needs of business and creating a fertile environment for capitalism.