Humankind’s greatest crisis coincides with the rise of an ideology that makes it impossible to address. By the late 1980s, when it became clear that manmade climate change endangered the living planet and its people, the world was in the grip of an extreme political doctrine, whose tenets forbid the kind of intervention required to arrest it. Neoliberalism, also known as market fundamentalism or laissez-faire economics, purports to liberate the market from political interference. The state, it asserts, should do little but defend the realm, protect private property and remove barriers to business. In practice it looks nothing like this.