Together, the EU and the UN work to uphold the multilateral system based on universal rules and values. In multilateral fora and globally, the EU and UN address crises and challenges to pursue a peaceful, just, and sustainable world. Effective EU-UN cooperation is fundamental to tackle today’s interconnected global challenges, which individual nations cannot address alone. As well as being a key political partner of the UN, the EU and its Member States are collectively the top financial donor to the UN system year after year.