Rostow hinted at his uncertainty of what might lie over that horizon, briefly acknowledging ‘the question beyond, where history offers us only fragments: what to do when the increase in real income itself loses its charm?’4 But he did not follow his own questioning through, and for understandable reasons: it was 1960 — the year of John F. Kennedy’s election bid on a promise of 5 percent growth — and for Rostow, a soon-to-be presidential adviser, it was wise to focus on keeping that plane in the sky, not on pondering when and how it would ever land.

In the Togolese capital of Lomé, architect Sénamé Agbodjinou and colleagues set up Woelab in 2012, a ‘low-high tech’ workshop making its own design of open-source 3D printers using the component parts of defunct computers, printers and scanners that have been dumped in West Africa.