Historical Traces of the World Wars: Impact and Lessons Received World Wars I and II were two events that drastically changed the course of human history. The impact of these two wars was not only felt at the time, but also had long-term political, economic and social implications throughout the world. The social impact of World War I was significant. Many countries are experiencing profound demographic changes due to the loss of many lives. Women’s role in society also underwent a transformation, as they took over many of the jobs left by men who had gone to war. This paved the way for a women’s rights movement that grew stronger in the following decades. World War II added a new dimension to the social impact. The discovery of weapons of mass destruction, such as the atomic bomb, made the rise of technology a double-edged sword. The world community is starting to discuss the ethics of using technology in war. Another important lesson from World War II was the need for international collaboration to prevent the same turmoil from recurring, resulting in the formation of the United Nations (UN) in 1945. The economic impact was no less significant. After World War I, many countries fell into economic crisis, with Germany being one of the heaviest victims of the burden of reparations. World War II worsened global economic conditions, but also gave rise to a new era of economic growth thanks to massive industrial mobilization. The Marshall Plan in Europe is an example of an attempt to rebuild a devastated economy after war. In addition, the ideological battle between capitalism and communism became more real. After World War II, the world was divided into two power blocs, namely the Western bloc and the Eastern bloc. This led to the Cold War, which highlighted the importance of diplomacy and negotiation. The occurrence of conflicts such as the Korean War and the Vietnam War shows that ideological tensions have serious consequences. Lessons learned from these two wars focus on the importance of diplomacy to resolve conflicts and prevent war. History teaches that military force is not a long-term solution. Diplomacy, international cooperation and intercultural dialogue are the keys to building a more peaceful world. Furthermore, both wars emphasized the importance of understanding the impact of racism and xenophobia. The Holocaust taught the world about the dangers of unresolved hatred, ultimately leading to the creation of international conventions to protect human rights. From an environmental perspective, World War II also implied the need for awareness of the ecological impacts of large-scale conflict. The damage caused by war creates new challenges in preserving the earth. Finally, the historical traces of the World Wars show that although the past is filled with conflict and sadness, it also provides hope for the future. The lessons learned from this bitter experience continue to influence world policy, defense strategy and international relations. From historical to ethical aspects, the lessons learned from World Wars I and II must continue to be taught to future generations. Now, the world has a responsibility to remember and correct the mistakes of the past while building a more peaceful and civilized future, making the journey of history a valuable guide.