Diplomacy and international relations in the era of globalization are experiencing significant transformations that affect the way countries interact with each other. Globalization, with its rapid flow of information, trade, and culture, has created an environment in which countries cannot operate in isolation. In this context, diplomacy plays a central role in maintaining peace and cooperation between nations. One of the main characteristics of modern diplomacy is the increasing role of non-state actors. International organizations, NGOs and multinational companies are now often key actors in policy making. For example, on environmental issues, such as climate change, many countries collaborate with private institutions and non-governmental organizations to achieve common goals. Furthermore, information technology is increasingly influencing diplomacy. Social media and online platforms enable rapid and extensive exchange of information, facilitating public diplomacy. Countries now use platforms such as Twitter and Facebook to communicate directly with the international public, influence global opinion and build the country’s image. It also changes the way countries respond to crises or emerging issues. The role of globalization also leads to the need for a multilateral approach in resolving various issues. Cooperation between countries in organizations such as the United Nations (UN) and ASEAN is a successful example of multilateral diplomacy. These forums allow countries to dialogue and negotiate in a structured environment, increasing the chances of a peaceful resolution. Transnational issues such as terrorism, migration, and global health are also increasingly important in modern diplomacy. Countries are required to work together more closely in dealing with problems that know no borders. Joint efforts to combat terrorism, for example, require the cooperative exchange of intelligence and strategy between countries. Despite this, major challenges remain. Geopolitical tensions and growing nationalism often contradict the need for global integration. Competition between great powers such as the United States and China is creating new dynamics that affect the entire spectrum of international relations. Issues of trade, technology and security are increasingly at the center of diplomacy, with each country prioritizing their national interests. In dealing with this complexity, it is important for diplomats to have adaptable and critical thinking skills. Diplomatic discussions are now more complex, requiring diplomats to understand the cultural, economic and political aspects of other countries in depth. Negotiation skills and the ability to build international networks are also keys to success. Apart from that, a values-based approach is also starting to emerge in international diplomacy. Countries are increasingly realizing the importance of human rights, democracy and social justice. This sparked international pressure to improve domestic practices deemed to violate those values, sometimes leading to tensions between countries with different political systems. The global conflicts that have occurred in recent years also show that diplomacy is not only about negotiations between countries. The existence of prolonged conflict in certain regions requires a more humanistic approach, where humanitarian assistance and reconstruction efforts become important. Humanitarian diplomacy is now a vital component to support communities in conflict-prone areas. In this era of globalization, diplomacy and international relations cannot be separated from the challenges and opportunities that exist. Success in creating a peaceful and prosperous world depends greatly on the ability of countries to collaborate, adapt and overcome differences. By strengthening diplomacy in the international realm, it is hoped that stability and prosperity will be more evenly distributed throughout the world.