The Modern World Wars influenced global geopolitics significantly. Conflicts that have occurred since the 20th century until now have shaped the political, economic and social maps in various parts of the world. First of all, World Wars I and II saw a shift in power from Europe to the United States and the Soviet Union. The completion of these two wars created two large blocs, namely capitalists and communists, which imposed a new international system. After the Cold War, new tensions emerged as middle powers began to play an active role. China and India, for example, are experiencing rapid economic growth, increasing their influence in the global arena. China, through the Belt and Road Initiative, is trying to strengthen trade and economic networks in Asia and Europe, shifting US dominance in several regions. On the other hand, conflicts in the Middle East, such as the Iraq and Syria Wars, play an important role in geopolitical dynamics. The war not only affected regional stability, but also created a power vacuum that was exploited by extremist groups. The existence of ISIS, for example, magnifies global security challenges and changes the way countries like the US and Russia interact. In addition, the emergence of new phenomena, such as cyber warfare, has overhauled countries’ security strategies. Cyber attacks on critical infrastructure are becoming a new tool in geopolitical competition. Large countries are starting to focus on digital security, creating special units for cyber defense. The involvement of non-state actors in such conflicts adds complexity, with hacking groups playing a role in disseminating propaganda and information. Climate change is also a strategic issue that cannot be ignored. The most affected countries, such as small island states, are struggling to increase their influence in global discussions. As access to resources becomes increasingly scarce due to global warming, competition for control of new areas, such as the Arctic, is intensifying. Countries are starting to strengthen their presence in the region to secure trade routes and mineral resources. Apart from economic and security factors, migration due to war and climate change also influences the demographic structure of countries. Refugees fleeing conflict or natural disasters often create social and political tensions in host countries. This also has an impact on immigration policies and increasingly complicated interactions between countries. International cooperation, although rocky, remains key to addressing global challenges. Organizations such as the UN and NATO play a role in de-escalating conflicts and promoting dialogue between countries. However, belief in multilaterality is also experiencing challenges as populism and nationalism increase in various countries. Concerns about the assumption of national sovereignty often hinder collaboration in addressing global problems. In this context, Modern World War is not just a physical conflict; it is an arena where ideology, culture and economics fight each other. Looking at the impact, it is clear that global geopolitics continues to evolve, creating challenges and opportunities that must be managed wisely by world leaders.