The richest man in American history wrote 38 secret letters to his son.
They weren't about money.
They were ruthless psychological principles J.D. Rockefeller used to build empires worth more than most countries.
Here's 9 principles he really taught his heir: 🧵
First, understand who Rockefeller was:
• Started in poverty, father was a con man
• Built Standard Oil from nothing
• Controlled 90% of U.S. oil refineries
• Worth $400 billion in today's money
But his greatest creation? These letters.
Principle 1: "Hardship is your greatest teacher"
Young Rockefeller faced crushing poverty and constant rejection.
His response? "I'm grateful for the struggle—it built the character that built the fortune."