For nearly all of human history, output per worker barely moved. A peasant in Tang China and a peasant in Georgian England produced roughly the same number of calories per day, with roughly the same tools, and lived to roughly the same age — economists call the trap Malthusian: any surplus was eaten by more mouths within a generation. Around 1760, in a damp corner of north-western Europe, this stopped being true — and has not been true since. British income per head, flat for centuries, began a climb that would multiply it more than tenfold. No previous society had escaped the trap; this one did, and dragged the species after it.
The mechanism was not a single invention. It was a stack: cheap coal sitting on top of cheap iron, beside a textile industry hungry for fibre, in a country with deep capital markets, secure property rights, an enforceable patent system, high wages (which made labour-saving machines pay), and a navy that policed half the planet's trade routes. Steam joined them — Watt's separate condenser (1769) cut fuel use so sharply it turned the engine from a colliery pump into a universal prime mover, one that could be sited anywhere, not just beside a coal seam or a fast river. Cotton was the wedge: a sequence of devices — Hargreaves's jenny, Arkwright's water frame, Crompton's mule — automated spinning so completely that a machine which had taken one woman a week's labour to operate could now be tended by a child for twelve hours and produce ten times as much yarn. Mechanized weaving and the factory followed. Within three generations, the share of the British workforce in agriculture fell from 60% to under 20%, and the modern industrial city — Manchester, Birmingham, Leeds — was invented along with the modern industrial worker, the factory clock, and the twelve-hour shift. The takeoff was geographically narrow and morally ambiguous. It was paid for, in part, by colonial cotton, by enslaved labour in the Americas, by the deliberate destruction of Indian textile manufacturing through tariffs and force. But it was also the moment when, for the first time, economic growth outran population growth — the precondition for every rise in living standard since, and the hinge on which the modern world turns.
Every contemporary debate about technology and labour — from automation to AI — is a re-running of the question Manchester first posed: who captures the gains when machines do the work? The early answer was brutal — real wages stagnated for roughly half a century while output soared, the Engels pause — and only organized labour, the slow extension of the vote, and the welfare state eventually redistributed the surplus. That lag, between a technology arriving and a society learning to share its fruits, is the pattern we are living through again, now compressed into the span of a single working career rather than spread across generations.