Power dynamics in Southeast Asia are rich in complexity, involving interactions between states, non-state actors, and external forces. This region is a portrait of cultural, political and economic diversity, which is reflected in relations between countries formed by a history of colonization, war and globalization. One of the main factors in power dynamics is the shift in economic power. Countries such as Indonesia, Thailand and Vietnam show significant economic growth. Indonesia, as the country with the largest population, has broad market potential and a wealth of natural resources. Meanwhile, Vietnam attracted global attention through its economic reforms, known as Doi Moi, which encouraged foreign investment and strengthened its position in ASEAN. In addition, China, with its Belt and Road Initiative (BRI) policy, is trying to expand its influence in Southeast Asia. Large infrastructure investments in countries such as Malaysia and Laos are changing the regional political map. China’s diplomatic tactics, including providing aid and building infrastructure projects, often fuel tensions with other countries, especially the US and Japan, which fear Beijing’s dominance. United States involvement remains significant, especially in the context of security and trade. US Indo-Pacific policy seeks to strengthen strategic alliances with ASEAN countries as a counterweight to China’s influence. Indonesia and the Philippines, two countries with strong defense agreements with the US, act as bulwarks in maintaining regional stability. ASEAN’s role as a regional organization is key in regulating and mediating conflicts between its member countries. Despite facing challenges such as political and economic differences among its members, ASEAN strives to maintain peace and stability, through diplomacy and dialogue mechanisms. However, tensions in the South China Sea highlight major challenges to this cooperation. The involvement of non-state actors, such as terrorist groups and criminal organizations, also contributes to power dynamics. Countries such as the Philippines and Indonesia face threats from extremist groups. Coordination between states and international institutions is important to address these issues, which often influence domestic policies and foreign relations. Apart from economic and security factors, environmental aspects are also a concern. The issue of climate change and sustainable natural resource management is a challenge for Southeast Asian countries, affecting social and economic stability. Cooperation in water resources management and disaster mitigation amidst threats such as deforestation and rising global temperatures illustrates the need for a collective approach. Social change and human rights advocacy add another layer to this dynamic. Pro-democracy movements and advocacy for human rights emerged in various countries, such as Myanmar and Thailand. However, the government’s response has often been repressive, demonstrating tensions between the aspirations of the people and the powers that be. Overall, power dynamics in Southeast Asia are influenced by complex interactions between internal and external factors, with constant change creating challenges and opportunities for countries in the region. Adaptation and collaboration between regional and global actors will determine Southeast Asia’s political, economic and social future.