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The agricultural revolution was not one switch flipped in antiquity. Working from a reference list of the term’s many meanings, this episode follows five distinct food revolutions. The Neolithic Revolution, around 10,000 BC, was the slow transition from hunting and gathering to settled agriculture, bringing the ideas of surplus, property and waiting months for a harvest. The Arab Agricultural Revolution of the 8th to 13th centuries spread new crops, irrigation knowledge, crop rotation and administrative practice across the Muslim world, a revolution of diffusion rather than invention.

In the 17th to 19th centuries the British Agricultural Revolution, also called the second, brought an unprecedented increase in productivity, while the Scottish Agricultural Revolution transformed farming into a modern, productive system, together marking the birth of agricultural capitalism. The Green Revolution of the 1930s to 1960s, the third, was a deliberate campaign by international organizations, philanthropic foundations and governments, breeding high-yield cereals such as dwarf wheat and exporting them with chemical fertilizers to the developing world. The same list ties the term to land reform, collective farming, agrarian change and precision agriculture.

• The gaps between revolutions shrank from thousands of years to a few centuries, then to about two centuries.
• Dwarf wheat was bred so its stalks would not collapse under the weight of the grain.
• Precision agriculture uses satellite-guided tractors and soil moisture sensors.
• The secondary products revolution kept animals alive for milk, wool and plow traction.
• The Cambrian substrate revolution describes ancient burrowing organisms reworking the seafloor.