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The power of planning explains the difficulty of valuing private companies. When a big company makes an offer to acquire a successful startup, it almost always offers too much or too little: founders only sell when they have no more concrete visions for the company, in which case the acquirer probably overpaid; definite founders with robust plans don’t sell, which means the offer wasn’t high enough. When Yahoo! offered to buy Facebook for $1 billion in July 2006, I thought we should at least consider it. But Mark Zuckerberg walked into the board meeting and announced: “Okay, guys, this is just a formality, it shouldn’t take more than 10 minutes. We’re obviously not going to sell here.” Mark saw where he could take the company, and Yahoo! didn’t. A business with a good definite plan will always be underrated in a world where people see the future as random.

Excerpted from ‘Zero to One’ by Peter Thiel