World Wars, both World War I and II, had a significant impact on the global economy. This impact extends to various aspects such as international trade, industry and the social conditions of society. World War I (1914-1918) changed the political and economic map of Europe. The countries involved suffered extensive physical and infrastructure damage. Many industries were destroyed, and the number of workers was drastically reduced due to deaths and injuries. Post-war, an urgent need for reconstruction emerged, prompting large investments in infrastructure. This causes a surge in demand for raw materials, thereby benefiting producing countries. The global economy also experienced high inflation due to large money printing to finance war. The emergence of hyperinflation, especially in Germany, led to prolonged economic instability. On the downside, this generated social discontent that gave way to the rise of extremist ideologies, including Nazism in Germany. World War II (1939-1945) brought greater changes in the global economic structure. After World War II ended, many countries, especially Europe, were forced to rebuild their economies from the rubble. However, the United States emerged as the largest economic power with unprecedented production capabilities. The Marshall Plan, which provided financial aid to speed Europe’s recovery, was instrumental in reviving the economy. However, the impact is not only felt in Europe and America. Other countries such as Japan and South Korea experienced rapid growth thanks to investment in post-war reconstruction. A global recession occurred in the late 1940s, but industrial development in the countries it helped as well as technological innovation brought recovery. The growth of international trade also accelerated after World War II, thanks to new institutions such as the IMF and World Bank. Trade liberalization policies encourage global economic growth, which is influenced by the involvement of the US and Western countries in helping developing countries. The World Wars also accelerated technological innovation that had long-term economic implications. War-era discoveries in industry, transportation, and communications opened the door to future progress, creating new jobs and empowering the global economy. The social impact of war is also significant. Women began entering the workforce en masse during both world wars, changing the dynamics of the workforce. This contributed to the increasing role of women in the economy, which continues today. Overall, the impact of the World Wars on the global economy was complex and multifaceted. Although war brings destruction, it also gives rise to opportunities for economic growth and transformation. As a result, the post-war world economy underwent a period of dramatic change. Society learns from history, especially regarding the need for international collaboration in development and stability.