World War I, which lasted from 1914 to 1918, had a profound and immediate impact on Europe. This conflict not only changed the political map of Europe, but also affected the economic, social and cultural aspects of the nations involved. First, the political impact of World War I was very significant. Great empires such as Austria-Hungary and the Ottomans collapsed, leaving a vacuum that created new states. For example, Czechoslovakia and Yugoslavia were formed, overhauling existing power structures. The Russian Revolution in 1917 resulted in the formation of the Soviet Union, changing political ideals in Europe. The perceived weakness of the great powers gave impetus to nationalism across the continent, creating new tensions among states seeking to expand their power. From an economic point of view, this war caused economic collapse in many European countries. The enormous costs of the war plunged many countries into serious debt. The devastated industry took years to recover, and many workers lost their jobs. Inflation skyrocketed, especially in Germany, causing a continuing economic crisis and paving the way for social discontent. The social sector is also experiencing drastic changes. The war brought changes in gender roles, with many women taking over jobs previously filled by men who had gone to war. After the war, although there was recognition of women’s contributions, many were expected to return to traditional roles. However, these changing expectations sparked a women’s movement for voting rights and equality in the workplace. The cultural impact cannot be ignored either. The war created a powerful influence on art and literature, forming a movement known as modernism. Writers such as Erich Maria Remarque and Wilfred Owen, through their works, reflected the psychological impact of war, known as “love and death.” The lifestyle and values of European society also changed; doubts and uncertainty about the future influence people’s way of thinking, creating irony in the context of previously booming optimism. In the field of international law, World War I also had a major impact. The formation of the League of Nations was the first attempt to create a sustainable peace system, although it ultimately failed to prevent World War II. However, the idea of international cooperation began in this period. Because of these impacts, World War I became a turning point in European history. The countries involved are struggling to recover from the physical and emotional damage left behind, with the legacy of these conflicts being felt for generations to come. The dissatisfaction and ambition that emerged from the war’s outcome provided fertile seeds for future conflicts, reinforcing that the lessons of World War I were not only relevant to those who experienced it, but remain valid today.