The role of diplomatic relations in building global peace is very crucial. Diplomacy as the main instrument in establishing communication between nations provides space to resolve conflicts peacefully. Through diplomatic channels, countries can dialogue, exchange views and build trust. This approach allows for the resolution of issues without resorting to violence or coercion, which is the basis for sustainable peace. First, multilateral diplomacy in international forums, such as the United Nations (UN), provides a platform for countries to collaborate in overcoming global challenges. In this forum, countries can agree on various treaties and agreements that regulate state behavior at the international level. For example, the Paris Agreement Convention on climate change calls for global cooperation in addressing environmental issues, further minimizing the potential for conflict due to depleting natural resources. In addition, bilateral diplomacy plays a significant role in maintaining harmonious relations between two countries. Through summits, negotiations, and agreements, countries can resolve disputes that have the potential to become conflicts. One clear example is the peace agreement between Israel and Jordan in 1994, which ended a long conflict and paved the way for economic and social cooperation. Strengthening relations between previously hostile countries creates a climate of stability that supports global peace. The role of international organizations in strengthening diplomatic relations is also very important. Organizations such as the European Union and ASEAN are able to unite various countries to build political, economic and cultural cooperation. By implementing collective policies, member states can reduce the risk of conflict and reach consensus on important issues. A public diplomacy approach, which involves interaction with civil society, is also an important element. Through cultural exchange programs, seminars, and educational cooperation, countries can build a better understanding of each other. This helps reduce stereotypes and prejudice, creating an atmosphere of mutual respect that is essential for peace. The importance of mediation in conflict resolution cannot be ignored. A neutral mediator can help conflicting parties find a mutually beneficial solution. The success of the mediation process depends on the parties’ trust and willingness to compromise. A prominent example is mediation by the Organization of Islamic Cooperation (OIC) in the conflict in Syria, which shows how diplomacy can open up space for constructive dialogue. Lastly, information and communication technology also plays a vital role in facilitating diplomatic relations in the modern era. Rapid dissemination of information makes it easier for countries to respond promptly to emerging issues, keeping communication channels open. Digital diplomacy provides an alternative to traditional diplomacy, with the benefits of real-time communications that increase responsiveness to crises. Overall, effective and sustainable diplomatic relations are the foundation for global peace. With a combination of multilateral and bilateral strategies, mediation, and the use of technology, the world can navigate the complexities of international relations and find peaceful solutions to existing conflicts.