The major global conflict that led to the establishment of a new world order was World War II. Spanning from 1939 to 1945, this conflict involved most of the world's nations and resulted in unprecedented destruction and loss of life. The aftermath of the war saw the rise of two superpowers, the United States and the Soviet Union, establishing a bipolar world dominated by competing ideologies: capitalism versus communism. The war also spurred the creation of international organizations like the United Nations, aimed at fostering global cooperation and preventing future conflicts. This reshaped diplomatic relationships and established frameworks for international law.