The modern global economy doesn’t just run on fossil fuels. It runs on inequality, which now stands indicted by a rapidly growing mountain of evidence, as the real driving force behind all the harms, and more, that have led to climate change. A world without inequality is not just desirable: it’s an urgent necessity. And it can be achieved. The market may or may not have an ‘invisible hand’ but it most definitely has an ‘invisible foot’ – inequality – which has been bearing down harder and harder on the world and its people in the frenzied pursuit of economic growth. Emissions will not reduce until that pressure is eased.

Our new understanding began with the epidemiological studies of inequality initiated by Michael Marmot and others in the 1970s. Today, thousands of surveys confirm that life in an unequal country is shorter and nastier than life in a more equal one.