Secrets

1. What a Secret Is

Thiel's favorite interview question—what important truth do very few people agree with you on?—is really a request for a secret. Its business form: what great company is no one starting? Roughly speaking, the world can support as many great new companies as it holds undiscovered secrets.

Secrets are unpopular or unconventional truths.

Truths come in three kinds: easy conventions everyone already accepts, impossible mysteries (like superstring theory) that cannot be tested, and a middle zone of hard but achievable truths—where secrets live. Secrets also move over time: triangle math was once Pythagoras's hard-won secret and is now a convention, while truths a society abandons can become hidden all over again.

• Monopoly: capitalism and competition are opposites, but monopolists pretend to be small and also-rans pretend to dominate, so the truth stays buried.
• Power law: returns are radically unequal—one investment can outperform the rest of a fund combined—yet people are wired to deny inequality.
• Distribution: sales matters far more than anyone admits, and salespeople work hardest at hiding that you are being sold to.
• The meta-secret: many important secrets are still out there—a belief that was conventional 50 years ago and has itself become a secret.

2. Why People Stopped Believing in Secrets

The extreme case is Ted Kaczynski, the Unabomber: a 167-IQ, Harvard-trained mathematician who argued that all hard-but-satisfying goals are gone, leaving people depressed—and whose cure was destroying technology so that hard problems could return. Milder versions are everywhere: hipster anti-tech irony, and religious, environmental, and market fundamentalisms that each split the world into easy truths, sacred mysteries, and forbidden heresy in between (try telling a market fundamentalist you can beat the market).

Geography reinforces the message. The map has no blank spaces left, so people quietly conclude the intellectual frontier is closed too: the periodic table looks finished, and going to Mars gets filed under impossible. Past triumphs become evidence that nothing big is left to do.

3. The Case for Secrets

If there were no secrets, markets would be perfectly efficient—yet in 2000 you could not call the dot-com bubble irrational, in 2007 naming the housing bubble was heresy, and the Fed modeled maximum subprime losses at $25 billion, off by orders of magnitude. Likewise, every fight against injustice begins as a minority's secret (as civil rights did), and every legitimate dissident presupposes a hidden truth about the system. Denying secrets means claiming either that everything is already just, or that nothing can ever be fixed.

The HP board saga shows the corporate cost. Tom Perkins wanted the board to wrestle with hard technical problems; Patricia Dunn's camp insisted such questions were beyond the board and that process compliance was the job—and ended up illegally wiretapping to hunt a leaker: process violations chasing process violations. Deny that hard, solvable problems exist and you get dysfunction, not safety.

The positive evidence: Andrew Wiles proved Fermat's Last Theorem in 1995 after roughly nine years of work—possible only because he believed the problem was hard rather than impossible. Web 2.0 showed that tiny secrets aggregate: individually trivial tweets summed into movements that helped topple governments. And WikiLeaks raises the timing question—does the secret that destroys a government surface before the secret that destroys its revealer?

4. How to Find Secrets

There are secrets of nature and then there are secrets about people.

Natural secrets demand observation and experiment; human secrets are things people hide because exposure would hurt them. Thiel argues human secrets are underrated—they tell you where to point your instruments. Monopoly, power law, and distribution are all both at once, and asking what a CEO cannot say reaches the anti-competition insight faster than deriving it from economic theory. Beware physics chauvinism, though: the PhD candidate who cut off his interviewer mid-question, insisting he already knew what would be asked, was wrong—and was not hired.

1. 1

   Nutrition

   Elite science abandoned the field decades ago; the food pyramid owed more to Kellogg's lobbying than to evidence, and the obesity epidemic followed. A Manhattan Project for nutrition, staffed by six great scientists, is a wide-open opportunity.

2. 2

   Stem cells × cancer

   Politics keeps the two fields apart, yet injected stem cells divide and multiply much like cancer, and some cancer cells behave like stem cells. The uninvestigated intersection may hide breakthroughs.

3. 3

   Cleantech and Tesla

   The real secret was sociological: cleantech was partly fashion. Musk embraced it—luxury electric cars for the rich fund cheaper models later. Start with a brand and build the tech company up underneath it.

4. 4

   Agriculture

   The trade deficit, around 4% of GDP, looks unsustainable, and exports are growing fastest in agriculture—a sector tech investors dismiss as pre-technological. The obscurity is the signal.

5. 5

   Governance

   Everyone debates big versus small government; no one explores doing more with less—which is exactly what technology means.

The basic challenge is to find things that are hard but doable. You want to find a frontier.

The corollary: never accept anyone else's definition of where the frontier is. Secrets are concealed both by nature and by the people around you.

5. What to Do with a Secret

Tell no one and you get no team; tell everyone and you get competitors. Intellectual and natural secrets are relatively safe to share; human and political secrets can be lethal—the essay quotes Goethe's Faust to warn that mankind has always punished those who put hidden truths on display.

PayPal, summer 1999: linking money to email was a big secret but not a hard one—others would find it soon—so the right call was to move extremely fast and share the secret liberally inside the company. One interview candidate revealed a different, human secret: he wanted Thiel's job. He was not hired, and weeks later he launched a competitor. PayPal's deeper secret was that fraud is endemic to finance: banks quietly absorb enormous losses rather than admit they cannot stop the theft.

Because the vocal companies dominate headlines, perception is skewed: the best companies may be hidden. Do not take the media's ranking of startups as the true power-law distribution—ask instead which potentially great company everyone is overlooking. The essay closes with Tolkien: the known road runs ever on, but around the corner there may wait a new road or a secret gate. Take the hidden paths.

Then vs. now (2026)

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