The significance of the United Nations in global politics lies in its role as a platform for diplomacy, conflict resolution, and international cooperation. Established in 1945, the UN promotes peace, security, and human rights through its various agencies and initiatives. It enables countries to address global challenges, such as climate change, poverty, and health crises, collaboratively. The UN also engages in peacekeeping missions to prevent conflicts and supports developing nations through humanitarian assistance. Overall, it serves as a critical institution for fostering multilateral dialogue and promoting the well-being of humanity.