World War I, which lasted from 1914 to 1918, was a global conflict involving many of the world’s major countries. The impact of this war was far-reaching, creating social, political and economic changes that changed the face of the world. One of the significant impacts is the occurrence of extraordinary human losses. It is estimated that around 10 million soldiers and 7 million civilians lost their lives, causing deep trauma for families and communities. The destruction of infrastructure in Europe is another aspect worth noting. Many cities were completely destroyed by war, leaving millions of people homeless. The establishment of the Treaty of Versailles in 1919 aimed to restore order but also exacerbated tensions in Europe, which had become a fertile ground for extremist ideologies such as fascism and communism. From a political perspective, World War I changed the global political map. Four great empires—the Ottoman, Austro-Hungarian, German, and Russian Empires—collapsed, giving way to new states such as Czechoslovakia and Yugoslavia. A new approach to diplomacy and international relations was required, which ultimately gave rise to the League of Nations, although in practice it did not succeed in preventing World War II. Important lessons from World War I include the importance of multilateral diplomacy and dialogue to prevent future conflict. A more open and inclusive model of diplomacy, involving various countries, including smaller ones, is crucial. Future generations must understand that mutual understanding and cooperation between countries is the key to maintaining global peace. The economic crisis was also a major impact of this war. The European economy experienced a severe recession, with many countries involved in large debts. Again, a valuable lesson is the importance of economic stability and healthy competition between countries in maintaining peace. Investment in education and economic development must be a priority for future generations to prevent the chaos that can arise from economic inequality. The social impact is also worth noting. Women played an important role during the war, taking over many of the jobs previously performed by men. This paved the way for the women’s rights movement around the world. Future generations must appreciate the importance of gender equality and ensure that the voices of all parties are heard in social and political decision-making. By reflecting on World War I, future generations are reminded of the consequences of aggressive attitudes and instability. Education about the history of the war must be prioritized to ensure that the same mistakes are not repeated. Openness in history education can help create a society that is more aware of the importance of peace and international cooperation. It is important for future generations to understand these various aspects in order to face future challenges with knowledge and empathy. By studying history, we not only remember the past, but also prepare ourselves to create a better world. All the lessons from World War I can be used as a guide in navigating a more peaceful and harmonious journey in life.