There are many international initiatives addressing climate change and other societal challenges. The Global Lab for Societal Innovation is just one of them.
Exemplary efforts are being made through various United Nations agencies to tackle the 17 Sustainable Development Goals (SDGs).
See, for example:
https://www.sdgactioncampaign.org/
https://en.wikipedia.org/wiki/Sustainable_Development_Goals
The Presencing Institute is working on several programs aimed at bringing people together to work on societal transformation.
See: https://www.presencing.org/
A recent initiative of extraordinary potential is the Earthshot Prize. The intention is the mobilize people to develop powerful initiatives to solve key climate problems by 2030.
See: https://earthshotprize.org/