## The forgetting
A barrel of oil contains 5.8 million BTUs. A human laborer produces about 0.5 kilowatt-hours per day. One barrel replaces roughly four years of human muscle. A gallon of gasoline costs three dollars. Four years of human labor costs a quarter-million. Every time you fill a tank, you are purchasing a small miracle of thermodynamic leverage and pricing it like a coffee.
Coal built the British Empire. Oil built the American century. Natural gas heated the European peace. Every economic system rests on a small set of physical flows, and the systems that forgot the flows — that treated the spreadsheet as more real than the wellhead — discovered the dependency the same way you discover gravity: by falling.
## The experiment
Between 1950 and 1973, global GDP grew in lockstep with energy consumption. Then the oil shocks hit, efficiency improved, and the curves appeared to diverge. Economists pointed at the gap as proof of decoupling. But the gap was partly an accounting trick — the United States offshored its factories to China and counted the goods as American GDP without counting the Chinese coal. The energy was still there. It was on someone else's books.
Someone who grew up in West Texas with a geologist father does not experience GDP as an abstraction. The ground produces energy. The energy produces the economy. The economy produces the theory that says energy is just another input. Start at the wellhead, where the start, and thermodynamics is the master variable. Start at the trading floor, where the start, and the price of West Texas Intermediate crude coordinates billions of daily decisions with an efficiency no planner has matched. Both readings contain real information. Neither addresses the cliff: the atmosphere does not send invoices, and the case gains force every year the dashboard argument continues while emissions climb. Underneath all three sits a question the find inescapable: every tradition that survived a millennium placed energy at the center of its cosmology, and the modern refusal to do so may be less an insight than an amnesia.
## Where it sticks
Everyone agrees energy is essential. The fracture begins at the word "just." Is energy just an input that markets price? Is money just a veil over thermodynamics? Is growth just a word for burning more? The answer determines whether the next fifty years look like a transition, a correction, or a backup plan for Mars.
Where do you stand?
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