| Engine | What changed | Impact | |--------|--------------|--------| | | Shift from muscle to machines; better farming, transport, and sanitation. | Death rates plummet. | | Medical Revolution | Vaccines, antibiotics (penicillin, 1928), germ theory, clean water. | Infant mortality collapses. People live past 40. | | The Green Revolution | High-yield crops, synthetic fertilizer (Haber-Bosch process). | Food supply finally catches up. |
That is the story of 8.1. And it's just beginning. 8.1 trends in human population growth
The Big Picture: A Hockey Stick for the Ages Imagine a graph that is flat for 99% of human history, then suddenly shoots up like a rocket. That is the story of our population. For millennia, growth was slower than a snail's pace. Then, in the last 200 years—a blink of an evolutionary eye—we exploded from 1 billion to over 8 billion. | Engine | What changed | Impact |
| Engine | What changed | Impact | |--------|--------------|--------| | | Shift from muscle to machines; better farming, transport, and sanitation. | Death rates plummet. | | Medical Revolution | Vaccines, antibiotics (penicillin, 1928), germ theory, clean water. | Infant mortality collapses. People live past 40. | | The Green Revolution | High-yield crops, synthetic fertilizer (Haber-Bosch process). | Food supply finally catches up. |
That is the story of 8.1. And it's just beginning.
The Big Picture: A Hockey Stick for the Ages Imagine a graph that is flat for 99% of human history, then suddenly shoots up like a rocket. That is the story of our population. For millennia, growth was slower than a snail's pace. Then, in the last 200 years—a blink of an evolutionary eye—we exploded from 1 billion to over 8 billion.
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