Why was the "New Deal" such a new concept for the United States government?

New Deal, domestic program of the administration of U. S. Pres. Franklin D. Roosevelt between 1933 and 1939, which took action to bring about immediate economic relief as well as reforms in industry, agriculture, finance, waterpower, labour, and housing, vastly increasing the scope of the federal government's activities. The term was taken from Roosevelt's speech accepting the Democratic nomination for the presidency on July 2, 1932. Reacting to the ineffectiveness of the administration of Pres. Herbert Hoover in meeting the ravages of the Great Depression, American voters the following November overwhelmingly voted in favour of the Democratic promise of a "new deal" for the "forgotten man." Opposed to the traditional American political philosophy of laissez-faire, the New Deal generally embraced the concept of a government-regulated economy aimed at achieving a balance between conflicting economic interests.