Franklin D. Roosevelt's leadership during the Great Depression was characterized by his implementation of the New Deal policies, aimed at economic recovery and social reform. He introduced initiatives such as the Social Security Act, which provided financial assistance and security to the unemployed and elderly. Roosevelt's government intervention helped stabilize the economy and restore public confidence through job creation programs and regulatory reforms. His ability to communicate effectively with the American people through Fireside Chats fostered hope, making his presidency a pivotal moment in U.S. history.