The United Nations (UN) was established in 1945 to maintain international peace and security, promote human rights, and support global development. In the present world order, it plays a crucial role in conflict resolution through peacekeeping missions, diplomatic interventions, and humanitarian aid. The UN agencies, such as the WHO and UNESCO, contribute significantly to global health and education. However, the effectiveness of the UN is often questioned due to the dominance of the five permanent members of the Security Council, who exercise veto power, leading to political deadlocks. The UN has faced challenges in responding to emerging global crises, including climate change, cybersecurity threats, and regional conflicts. While it remains a key platform for international cooperation, reforms are needed to enhance its decision-making and effectiveness.