Ten years on, the Paris Agreement is working, but not nearly fast enough. Since 2015 it has become the essential organising framework for global climate action: uniting countries behind the 1.5°C temperature limit and net-zero goals, reshaping science and policy, helping mobilise climate finance and clean-technology investment, and driving national reforms that otherwise would not have happened. This briefing lays out 22 ways it is changing the 21st century for the better.