The sirens of BAU (Business as Usual) are singing a seductive song that everything will be okay if we just apply a bit more technology, a bit more efficiency and a lot more optimism. Well, the wheels are starting to come off ‘spaceship Earth’ yet the siren song is still being sung, to great applause. Consider the latest offering: Hannah Ritchie’s ‘Not the End of the World: How We Can be the First Generation to Build a Sustainable Planet’. It’s a Pollyanna potion we should think carefully about before taking.