The united nation organisation (UNO) is primary regarded as successful because

The United Nations (UN) is considered a successful organization because it has helped maintain peace and prevent the outbreak of another world war since its creation in 1945. The UN brings together all the member countries to work towards common goals, such as promoting peace and security, protecting human rights, and promoting sustainable development. Additionally, the UN provides a platform for countries to discuss and resolve international issues peacefully through diplomacy and negotiation, rather than resorting to war. This helps to maintain stability and security around the world, making the UN a vital player in maintaining global peace and security.