The role of diplomatic relations in building sustainable global peace is very significant. Diplomacy is the main tool for preventing conflict and creating international cooperation. Through constructive dialogue, countries can overcome differences and pursue mutually beneficial foreign policies. One important form of diplomacy is negotiation. In the context of conflict, negotiation can help reduce tensions and forge sustainable agreements. For example, the Oslo Peace accords between Israel and Palestine show how dialogue can give rise to hope for peace, even though there are still challenges that must be faced. Diplomatic relations also function as a communication bridge. In the midst of a global crisis, effective communication can reduce misunderstandings between countries. For example, during the COVID-19 pandemic, countries have relied on diplomatic channels to share information regarding public health policies and vaccine distribution. The importance of international organizations, such as the UN, cannot be underestimated. The UN facilitates dialogue between countries and provides a platform for them to collaborate on global issues such as climate change, terrorism and human rights. Through resolutions and peacekeeping missions, the UN plays an active role in preventing conflict and supporting stability in vulnerable areas. Apart from that, cultural diplomacy also contributes to creating peace. Student, arts and cultural exchange programs strengthen relationships between communities and promote understanding and tolerance. When individuals from diverse backgrounds meet, they create networks that can help relieve tensions that may arise due to stereotypes and prejudice. Economics also plays an important role in diplomatic relations. Economic cooperation through free trade or joint investment can strengthen relations between countries. When countries have strong economic interdependence, the risk of conflict tends to decrease. Successful examples such as the European Union show that economic integration can create sustainable peace. In the digital era, sophisticated communications technology facilitates more effective diplomacy. Through social media and digital platforms, government officials can communicate directly with the international community, building positive public opinion and promoting global peace. Civil society also has a crucial role in diplomatic relations. NGOs and international organizations often contribute to peace advocacy, giving voice to marginalized communities, and highlighting important issues that need global attention. When civil society is involved, the diplomatic process becomes more inclusive and responsive to the needs of society. Therefore, diplomatic relations not only function as a tool to achieve political goals, but also as a foundation for building lasting peace. By utilizing various aspects of diplomacy, countries can work together to create a more stable and peaceful world. The sustainability of peace depends not only on formal agreements, but also on the willingness of all parties to collaborate in facing complex global challenges. An active role in diplomatic relations is necessary to realize a vision of better peace in the future.