Before 1800, about 85% of humans worked in agriculture. The average person in 1800 didn't live meaningfully better than the average person in 1000, or 500 BCE. Then, over the span of two centuries, a series of inventions reshaped human existence more than everything that came before combined.

The Industrial Revolution is usually dated to around 1760 in Britain. Why there, and why then? Historians point to a rare combination of factors: abundant coal, surplus agricultural labor forced off the land by enclosure of the commons, political stability, legal protection of property rights, and a scientific culture that prized experimentation.

The breakthrough that triggered everything was the steam engine. Thomas Newcomen built a working atmospheric engine in 1712 to pump water out of coal mines. James Watt's radical improvements in the 1770s made the engine efficient enough to drive factories. For the first time in history, mechanical power was decoupled from animals, wind, and water. You could put a factory anywhere and run it 24 hours a day.

This changed work fundamentally. Before industrialization, most people worked at home, on small farms or in cottage workshops. The pace was set by seasons, daylight, and the tasks themselves. Factory work introduced something new: clock time. Workers arrived at a specific hour, worked for a specific duration, received a specific wage. The very concept of being 'on time' became possible.

The consequences were staggering. Productivity per worker rose roughly fifty-fold over two centuries. Infant mortality, which had been around 30% for millennia, began its long decline. Life expectancy, stuck below 40 in England for centuries, climbed steadily. Literacy became universal. Average height increased as nutrition improved.

But early industrial life was brutal for workers. 14-hour days in unventilated factories. Children of seven working in coal mines. Entire families crammed into single rooms in smoky, polluted cities. The Romantic poets and writers recoiled from what Britain was becoming. Karl Marx wrote Das Kapital in response. These weren't minor protests — the injustice was real, and it shaped the next century of political upheaval.

The world still hasn't completed the transition the Industrial Revolution started. Billions of people remain in agricultural poverty. But the template was set: human prosperity isn't bounded by solar energy and animal labor. Machines, and the knowledge to build them, can multiply human effort almost without limit.

That's the revolution. We're still inside it.