From the UN website:
The United Nations is an international organization founded in 1945. Currently made up of 193 Member States, the UN and its work are guided by the purposes and principles contained in its founding Charter.
The UN has evolved over the years to keep pace with a rapidly changing world.
But one thing has stayed the same: it remains the one place on Earth where all the world’s nations can gather together, discuss common problems, and find shared solutions that benefit all of humanity.
Current/Past Programs:
Support Sustainable Development and Climate Action
Agenda 21 – https://web.archive.org/web/20211223092427/https://sustainabledevelopment.un.org/outcomedocuments/agenda21
Agenda 2030 – https://www.un.org/sustainabledevelopment/development-agenda/
Strongcities Network
https://strongcitiesnetwork.org/en/ . This is a push by the UN to go around our Federal and State governments to get US cities onboard with their agenda, directly.