Which international organization is responsible for maintaining global peace and security, as well as promoting international cooperation and development?

The United Nations is an international organization established in 1945 after World War II with the primary goal of maintaining international peace and security. It serves as a platform for cooperation among countries and addresses various global challenges such as conflicts, poverty, disease, and environmental issues. International Monetary Fund (IMF) primarily focuses on global monetary cooperation and financial stability, providing loans to member countries facing economic difficulties. United Nations Educational, Scientific and Cultural Organization (UNESCO) focuses on promoting education, scientific advancements, cultural exchange, and the protection of cultural heritage. World Health Organization (WHO) is responsible for international public health issues, including disease prevention, health care, and global health emergencies.