The most pertinent example here is probably climate change. To combat climate change effectively, the international community needs to agree on a common set of rules – agreements that are only sustainable in the long term if they are underpinned by strong international networks. The Bank for International Settlements (BIS) is one example of a solid international network.
With over 60 member central banks, it has been setting global standards for 90 years now. It is home to a number of significant standing committees which work towards harmonising financial and banking systems.