I listened to a BBC Hard Talk interview of Roger Hallam this weekend, he being the founder of Extinction Rebellion. The ER group comprises the type of people who glue themselves to streets and footpaths because of climate change. No, it’s not clear why being glued to the road will change the climate, but it takes all sorts.

It is worth listening to Roger to understand the depth of his paranoia. In his mind, human civilisation is about to collapse. Within 50 years, he says the planet’s population will have dropped to 1 billion. That is, 6 billion people (give or take a few) will die. Primarily, this will be due to starvation. Roger believes that ‘the elites’ and the politicians know this but have been lying to the people about efforts being made to combat climate change. In his view, a critical mass of ‘ordinary’ people have realised this and now it is time for mass civil disobedience. He has studied theories of establishing revolution. At least in this regard, he knows his stuff.