The Impact of World War on the Global Economy World War I and II had a significant impact that changed the global economic order in profound ways. First, changes in industrial structure occurred due to the need to produce military goods. Many countries replaced civilian production with war goods, creating technological innovations that were then applied to the civilian sector post-war. A clear example is the development of airplanes and communications technology which has triggered progress in the civil industry. After World War II, many European and Asian countries faced widespread infrastructure damage, resulting in the need for urgent economic rehabilitation. The Marshall Plan, launched by the United States, provided massive financial assistance to European countries. This program not only aids economic recovery, but also strengthens diplomatic and economic ties between the US and Europe, creating the foundation for deeper economic integration. The war also prompted changes in global trade patterns. Countries that previously had limited trade relations with each other began to forge new collaborations. For example, with the formation of GATT (General Agreement on Tariffs and Trade) after World War II, countries attempted to reduce tariffs and trade barriers to restore the global economy. This was the first step towards greater globalization of trade in the following decades. Additionally, war often results in high inflation and monetary instability. Countries involved in war experience the need to print money to finance military operations, which often leads to hyperinflation. The most striking example is post-World War I Germany, which experienced extreme hyperinflation in the early 1920s, resulting in widespread economic and social collapse. Economic reconversion also became an important issue after the war. Countries must transition from a war economy to a peace economy, which is often accompanied by challenges in creating jobs for former soldiers. Unemployment rose as the military industry shrank. In the United States, the GI Bill program helped veterans obtain education and training, speeding their integration into the civilian economy. In addition, war increases the role of the state in the economy. Governments of many countries are starting to implement intervention policies to guide economic recovery as well as support local industries. This policy aims to protect strategic industries and ensure social stability. This leads to a shift from economic liberalism towards more protection and regulation. From an investment perspective, the war also triggered major changes. Many investors seek opportunities in war-affected countries, hoping to profit from reconstruction. This has resulted in significant capital flows to countries trying to recover, creating new growth opportunities. On the other hand, high risks during war periods discouraged many investors, which often affected the availability of funds for new projects. In a geostrategic context, the economic impact of war shapes new alliances. Warring states often found themselves dependent on each other in post-war economic and political terms, for example, the NATO alliance in response to Eastern bloc threats in the context of the Cold War. This alliance functions not only as military defense but also as economic cooperation between members. Finally, the social impact of war also impacts the economy. War often creates collective trauma, which influences people’s consumption patterns and economic behavior. Mental and social recovery requires time and resources, which in turn can affect economic growth. This is why understanding the economic impact of war is key to planning a sustainable, long-term recovery.