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What % of your biological functions are you capable of supporting without commerce?
We had life for three billion years before we had commerce.
Doesn't Matter. What can YOU support without it. (less than 1) If we collectivise the answer, is it 7.5 billion people? Not without commerce it isn't.
He wants to receive energy, transportation, medicine, protection, and food. He would pay all back by writing scientific papers. An economy is not needed because those things just happen. There's no value exchange and risk taking. Just nice human interactions.
How many of those billions of years were we a sedentary highly specialised society relying on people having a narrow range of skills to create products needed by society? We are not hunter gatherers anymore
Closer to 4 billion, but that’s a quibble.
What's a Billion years or a Billion people at the edge of an economy?
rounding error 
Yeah, we also didn't have humans for 3 billions years.
not in how we know it today. trade is as fundamental as that life that we seem so desperate to send to oblivion by tanking our ability to produce and fight back.
We also had life for a long time without oxygen. (I love your work, by the way.)
This is great news for Beetles 
Every other species on earth supports their biological functions just fine w/o commerce. And humans survived w/o commerce for 95% of human existence.
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