Global power movements in 21st century geopolitics demonstrate complex and interesting dynamics. In recent decades, a number of factors have influenced this shift, including technological developments, global crises, and changes in foreign policy. One of the main causes of the shift in power is the rise of countries such as China and India. China, with the motto “One Belt, One Road,” invests heavily in global infrastructure, strengthening its position as an economic and political power. India, on the other hand, is capitalizing on its young demographics and growing economy to become a key player in the Asia-Pacific region. Meanwhile, the United States, although still the dominant power, faces challenges in maintaining its position. Dissatisfaction with US foreign policy is reflected in rising tensions with Russia and now the emergence of new powers such as Iran. This shows that the monopoly of transatlantic power is starting to be disrupted, giving rise to multipolarity in the international system. Climate change also plays a significant role in the geopolitics of this century. Natural disasters and shifts in natural resources lead to new conflicts. Countries struggle to secure access to clean water and energy, with major impacts on political stability. Regions such as the Middle East and Sub-Saharan Africa are experiencing increased tensions due to this issue. Cyber technology has also become a new battle arena in geopolitics. Countries use cyberattacks not only to gather intelligence, but also to influence elections and public opinion in other countries. Information warfare is becoming the main weapon, reducing the boundaries between military and non-military conflicts. The economic aspect is also one of the main pillars in geopolitical strategy. International trade affected by protectionism shows how countries seek to exploit their comparative advantages. Threats to globalization increase the risk of divisions in alliances, creating obstacles to international cooperation. Additionally, energy security remains a central issue in 21st century geopolitics. Following conflicts in the Middle East, the world’s dependence on oil and natural gas creates serious geopolitical risks. Efforts to switch to renewable energy are now not only an environmental strategy, but also a national security strategy. The distribution of military power also changed. Countries with modern armed forces such as Russia and China have demonstrated their ability to carry out complex military operations, challenging US military dominance. New alliances emerged, such as the Shanghai Cooperation, aimed at improving the strategic position of non-Western countries. The active involvement of international organizations is also no less important. The UN, NATO and other regional organizations try to address global challenges with a multilateral approach. However, the effectiveness of these organizations is often questioned amid differences in views between major countries. Finally, shifts in global power create new challenges for global stability. Countries must navigate increasingly complex environments, respond to interactions between old and new forces, and adapt to rapid change. Through a deeper understanding of these dynamics, countries can formulate more effective and sustainable foreign policies.