The role of diplomatic relations in building global peace is very crucial in this modern era. Diplomacy, as the art and practice of managing relations between countries, has various functions in creating stability and reducing conflict. Through constructive dialogue, countries can resolve differences, establish cooperation, and create a consensus that supports peace. One way diplomacy contributes to global peace is through negotiating international agreements. These agreements could include arms control, environmental protection, or trade agreements. A clear example is the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), which aims to prevent the spread of nuclear weapons and encourage the use of nuclear energy for peaceful purposes. Through this agreement, countries are committed to maintaining global stability and security. In addition, diplomatic relations play an important role in conflict resolution. Experienced mediators are often used to help disputing parties reach a peaceful solution. An example is the UN’s involvement in conflicts in several regions, where this organization functions as a mediator to resolve disputes and end violence. Preventive diplomacy is also an effective strategy, where countries can take an early approach to resolving tensions before they escalate into armed conflict. Diplomatic relations also support sustainable economic development, which is an important factor for peace. Through trade and investment cooperation, countries not only strengthen their relationships but also create positive dependencies. When countries have mutually beneficial economic interests, the likelihood of conflict is much lower. A solid economic partnership can create stability and improve people’s quality of life. The role of international organizations also cannot be ignored in diplomatic relations. Organizations such as the UN, NATO, and the European Union serve as platforms for organizing discussions and collaboration between countries. Through membership in the organization, countries have the opportunity to engage in multilateral discussions, which promote dialogue and understanding. This kind of forum facilitates conveying the positions of each country and finding common ground. In the context of climate change, environmental diplomacy has become very important. Countries are now more aware that environmental problems impact global security. Through agreements such as the Kyoto Protocol and the Paris Agreement, countries collaborate to address global challenges that have the potential to trigger conflict. Togetherness in facing environmental threats shows that diplomacy is not only limited to political relations, but also includes aspects of humanity and planetary sustainability. Education and cultural exchange are also key aspects of diplomatic relations. Student exchange initiatives and other cultural programs help build bridges between cultures, reduce prejudice, and create mutual respect. When individuals from different backgrounds meet and learn from each other, they tend to develop broader perspectives, which in turn can reduce tensions between countries. Finally, a country’s ability to implement digital diplomacy is increasingly important. With advances in technology, diplomacy can now be conducted via virtual platforms, enabling faster and more efficient interactions. This provides an opportunity to build better relationships despite geographic distance. Digital diplomacy allows countries to explore global issues together, such as public health, and food insecurity, all of which impact world peace. In this context, diplomatic relations are not only a tool for avoiding war, but also a foundation for building sustainable peace throughout the world.