Meet John D. Rockefeller: Ledger A
MentorMind
The bookkeeper's religion
At sixteen, Rockefeller recorded every penny earned, spent, and given in 'Ledger A' — a book he kept like scripture all his life. Standard Oil was that ledger scaled: measure everything, waste nothing, compound relentlessly. He tithed from his first paycheck to his last.
The verdict
The Supreme Court broke up Standard Oil in 1911 — the monopoly's rebates and squeezed rivals were real, and history's verdict is fair. So is the other half: retail kerosene prices fell for decades, and his second act invented modern philanthropy — the University of Chicago, medical research that helped end hookworm and yellow fever.
Why they belong at your table
Seat him for discipline in the details: know your numbers cold, compound patiently — and hear firsthand what scale costs.
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