““Back in Ancient Greece when Xenophon first posed the economic question, ‘How should a household best manage its resources?’ he was literally thinking about a single household. Towards the end of his life he turned his attention to the next level up, the economics of the city state, and proposed a set of trade, tax and public investment policies for his home town of Athens. Jump forward almost two thousand years to Scotland, where Adam Smith decisively raised the focus of economics to the next level up again, the nation state, asking why some nations’ economies thrived while others stagnated. Smith’s nation-state economic lens has gripped policy attention for over two hundred and fifty years, and is entrenched by those yearly statistical comparisons of national GDP. But now faced with a globally connected economy, it is time for this generation of thinkers to take the inevitable next step. Ours is the era of the planetary household – and the art of household management is needed more than ever for our common home. Can””