Final answer:
Among Roosevelt's Four Freedoms, 'freedom from want' was the most challenging to achieve as it required significant efforts both domestically, aligning with New Deal goals, and internationally, in shaping economic cooperation. It addressed economic recovery from the Great Depression and necessitated a shift from U.S. isolationism to active participation in global economic stability.
Step-by-step explanation:
Franklin D. Roosevelt's speech about the Four Freedoms set forth a vision for American purpose during World War II, aligning closely with domestic policies like the New Deal and shaping foreign policy decisions. Among these freedoms, freedom from want was probably the most challenging to achieve, as it directly related to both domestic economic policies and international economic relations. Roosevelt's vision required not only alleviating economic distress within the United States but also establishing economic understandings globally to ensure a healthy peacetime life for all people. This goal was intertwined with the policies of the New Deal, which aimed at economic recovery and social reform within the U.S., and extended those ideals to the international arena.
Implementing freedom from want domestically challenged Roosevelt in the wake of the Great Depression, requiring continued New Deal programs that focused on relief, recovery, and reform. Internationally, it implied a commitment to economic cooperation and aid to other nations, which was critical for post-war recovery. It was a substantial undertaking given the isolationist tendencies in the U.S. prior to the war and the complexities of establishing economic relations that would be beneficial to all involved nations. Moreover, the U.S. faced challenges in reconciling its own prosperity with the need for international economic stability, which was essential for ensuring freedom from want as articulated by Roosevelt.