Do democracies need to fear climate extremism?

These days, the extreme right-wing attacks democracy in many countries. Is there a risk of an additional challenge from climate activists who conclude that democracies will never do enough to slow down the climate emergency?

There are such voices. Already a decade ago the climate scientist James Lovelock, deeply-frustrated by the slow response to the unfolding catastrophe, suggested that climate change should be seen as a war and in a war "democracy can be put on hold".

I do not...