Kim Cranston suggests that - Climate change is not humanity's greatest challenge (even though scientists predict it may unleash public unrest, cross-border conflicts and mass migration in 20 years, and increase the global surface temperature up to 11.5 degrees Fahrenheit by 2100).
Neither are pandemics, nuclear proliferation, water scarcity, the Middle East conflict, or many other things you might think.
Our greatest challenge is that our institutions can't resolve any of these challenges, let alone prioritize climate change as the challenge that poses the greatest threat if we don't act immediately. Until we address the crisis of the failure of our institutions to resolve the significant challenges we face, don't expect progress on any of them.
In order to address climate change (and give it the priority it demands), as well as the other significant challenges we face, we must rapidly evolve the capacity of our institutions to make better decisions than the ones that have put our survival in jeopardy.