“Why is our culture still chasing, consuming, striving ever harder, even though we know in our sophisticated minds that it’s an unrewarding route to eco-geddon? New scientific studies are helping to reveal why. It’s our primitive brains. These marvellous machines got us down from the trees and around the world, through ice ages, famines, plagues and disasters, into our unprecedented era of abundance. But they never had to evolve an instinct that said, ‘enough’.”