The World Wars had a significant impact on the global economy, and the lessons from these two major conflicts are still relevant today. World War I (1914-1918) and World War II (1939-1945) not only resulted in huge losses of life, but also changed the economic structure of various countries. One of the biggest economic impacts of World War I was the decline in industrial production in Europe. Countries involved in the war, such as France, Germany, and England, suffered massive infrastructure damage. This causes major disruptions in supply chains and reduced economic output. In turn, inflation soared, and many countries struggled to pay war debts. In the context of World War II, its impact on the global economy was broader and more profound. This war created the need for increased military production, which initially provided a boost to the economies of countries such as the United States. However, when the war ended, many European and Asian countries faced economic depression and a rise in nationalism that made recovery difficult. The process of economic recovery after World War II is known as the European Economic Council. With the help of the Marshall plan, the United States provided significant financial support to European countries to rebuild their economies. This revival not only affected the economies of individual countries, but also created the foundation for global economic integration, including the formation of the European Union. The World Wars also triggered changes in international trade policy. During and after the conflict, many countries began to practice protectionism, which had a negative impact on global trade. However, the desire to prevent further conflict prompted the creation of institutions such as the World Trade Organization (WTO), which sought to better regulate international trade. Rapid technological changes during the war also affected the economic sector. Innovations in technology, transportation, and communications, stimulated by the needs of war, were later implemented in the civilian sector and contributed to global economic growth. Economic crises resulting from war also often produce profound social changes. Many countries are seeking to change their economic systems to address real injustices as larger workers’ and middle-class movements emerge. This in turn has led to the formation of more inclusive social policies in many countries. It is important to note that the impact of war on the global economy is not just short-term. As a result of the World Wars, the pattern of economic power changed, with countries outside Europe, such as the United States, playing a more dominant role. This created a new world order characterized by international collaboration. By studying these impacts, we can understand the importance of political and economic stability to prevent larger conflicts in the future.