The history of the World Wars consists of two major conflicts that rocked the planet: World War I (1914-1918) and World War II (1939-1945). These two wars not only caused great physical destruction, but also changed the political, social and economic map of the world. Through understanding this history, the next generation can learn valuable lessons that are relevant in the current context. World War I, known as the “Great War”, resulted from rivalries between the great European powers, such as Germany, England, France, Russia, and Austria-Hungary. The main causes include high nationalism and complex military alliances. Battles on multiple fronts, such as at Verdun and the Somme, demonstrated how devastating modern conflict and the use of new military technology could be. One of the important lessons from World War I was the dangers of extreme nationalism. Warring states show how a sense of identity and domination can fuel large-scale conflict. Future generations must learn to appreciate pluralism and tolerance without getting caught up in the destructive spirit of nationalism. World War II emerged from dissatisfaction with the results of World War I and the global economic crisis. The rise of totalitarianism, especially in Germany (under Adolf Hitler) and Italy (under Benito Mussolini), signaled a danger to democratic societies. This war not only involved big countries, but also brought about the cruelty of the Holocaust and the use of nuclear weapons. From World War II, we learned about the importance of international collaboration to prevent conflict. Organizations such as the United Nations (UN) were created to facilitate dialogue and prevent war through diplomacy. Future generations need to realize that peace is not just about avoiding conflict, but also creating reliable structures to resolve differences. Moreover, the economic impact of both wars suggests that global connectedness can be a double-edged sword. The war destroyed many economies, but also led to advances in technology and production methods. The lesson for the next generation is the importance of innovation and sustainability in maintaining prosperity, even in critical times. Gender aspects were also highlighted during and after both wars. Women took on important roles in industry to replace men who had gone to war, marking the beginning of significant social change. Women’s education and empowerment must continue to be encouraged to achieve social and economic justice in the future. Finally, historical accounts emphasize the importance of documentation and learning from past mistakes. Looking back at the tragedies and heroic acts during the World Wars provides valuable perspective on how we should behave today. For future generations, studying history is not just an academic subject, but also a call to action for a better future.