What lies behind the political right’s growing refusal to accept the overwhelming scientific consensus? There’s certainly a strong tendency, especially in the US, for conservative white men to refuse to accept climate change is caused by human beings. But there shouldn’t be any inherent reason why people who believe in social hierarchies, individualism and inequality should care less about the threat of floods, drought, starvation and mass migrations than anyone else. After all, rightwing people have children too.

Part of the answer is in the influence of some of the most powerful corporate interests in the world: the oil, gas and mining companies that have strained every nerve to head off the threat of effective action to halt the growth of carbon emissions, buying legislators, government ministers, scientists and thinktanks in the process. In the US, hundreds of millions of dollars of corporate and billionaires’ cash (including from the oil and gas brothers Koch) has been used to rubbish climate change science. That is also happening on a smaller scale elsewhere, including Britain.

But climate change denial is also about ideology. Many deniers have come to the conclusion that climate change is some kind of leftwing conspiracy – because the scale of the international public intervention necessary to cut carbon emissions in the time demanded by the science simply cannot be accommodated within the market-first, private enterprise framework they revere. As Joseph Bast, the president of the conservative US Heartland Institute told the writer and campaigner Naomi Klein: for the left, climate change is “the perfect thing”, a justification for doing everything it “wanted to do anyway”.