The United States federal government underwent a major transformation after the Great Depression. This transformation was led by Franklin D. Roosevelt and was called the New Deal. Roosevelt was elected president in 1932 and immediately went to work for the American people. The New Deal represented an unprecedented level of federal intervention in the economy and lives of Americans. It can be said that it was the introduction of big government in the United States that to a great extent still exists today.
The New Deal was an attempt to use the federal government's spending to stimulate the economy. It provided massive public works projects that employed thousands of jobless Americans. It attempted to fix the problems of the economy by regulating banks, agriculture, and industry in a way that was unprecedented in American history. The New Deal saw the creation of programs that would endure to this day including Social Security and the FDIC.
What the government did after the Great Depression was to try to use its power to make a difference on an economy that created hopelessness and misery since the stock market crash in 1929.