The Selective Service Act of 1917 was a United States federal law that authorized the government to draft citizens into military service during World War I. This act was significant as it aimed to quickly build up the American military forces to meet the demands of the war and included provisions for registering men aged 21 to 30 for potential conscription. Its implementation had a major impact on the social fabric of the nation, influencing demographics, labor, and Georgia's contributions to the war effort.