President Franklin Delano Roosevelt unveiled his "New Deal" after his first election. It included a sweeping number of programs designed to put people back to work and relieve the effects of the Depression on young people, the elderly, and those who had been already in poverty before the Depression began. Controversially, it also included attempts to rein in the power of the big banks and corporations, for which Roosevelt was reviled by many in his own societal circle, who called him a "class traitor."
The Works Progress Administration (WPA), for example, the largest of the New Deal programs, put millions back to work building roads, bridges, schools, post offices, and many other public projects, much of which is still in existence and use today. In 1935, Roosevelt signed the Social Security Act, creating a "safety net" for the elderly to live out their lives securely. This program, now a vital part of the American way of life, continues to be attacked by conservatives, who call it an "entitlement."
Not all of Roosevelt's New Deal programs were successful, but he is justly credited with pulling the US (and to a large extent, the world) out of the greatest economic disaster experienced in modern times.