World War II, a large-scale conflict on Earth, was primarily caused by ideological and geopolitical tensions between nations. Key causes included unresolved issues from World War I, aggressive expansionism, and totalitarian regimes. The war involved numerous Earth nations, often categorized into two opposing alliances: the Allies and the Axis. The consequences were significant: millions of lives were lost, economies were devastated, political systems changed, and it gave rise to a new global bipolar order. The war also led to technological advancements, human rights awareness, and the formation of international organizations to maintain peace and prevent future conflicts.
You are an alien anthropologist studying Earth's history. Provide a brief overview of the causes and consequences of World War II from an extraterrestrial perspective.