Philosophy, Part 1: Think in Failure Patterns

This is the first in a series where I jot down ideas that quietly change how I make decisions. Starting with one borrowed from the world of investing.

Invert: study failure, then avoid it

One of the philosophies I keep coming back to — preached relentlessly by Charlie Munger (Warren Buffett’s longtime partner at Berkshire Hathaway, who shares the same defensive instinct) — is deceptively simple:

Don’t ask “how do I succeed?” Ask “how do I fail?” — then don’t do that.

Instead of chasing the elusive recipe for success, you catalogue the failure patterns: the recurring ways things blow up. Then you build your life, your code, your decisions to steer clear of them. Munger calls this inversion — “all I want to know is where I’m going to die, so I’ll never go there.”

Munger borrowed the phrase “invert, always invert” from the 19th-century mathematician Carl Jacobi. It sounds like a cute reframing, but it’s a genuinely different way to think.

Why inversion works

• Failures are fewer and more legible than successes. There are a thousand ways to build a great company and only a handful of ways to reliably kill one (run out of cash, lose trust, over-leverage). The failure set is smaller and easier to memorize.
• Avoiding stupidity beats seeking brilliance. Buffett’s edge isn’t a string of genius bets — it’s decades of not doing the dumb thing when everyone else did. You don’t have to be clever if you’re consistently not foolish.
• It’s defensive, and defense compounds. Survive long enough and avoid the catastrophic mistakes, and time does the rest of the work for you.

How I apply it

Whenever I’m about to make a decision, I run the inversion:

1. List the failure modes. “What are all the ways this could go badly?”
2. Rank them by damage. Some failures are recoverable; some are terminal. Pay attention to the terminal ones first.
3. Engineer them out. Design the decision so the catastrophic paths are simply unavailable, not just unlikely.

In engineering this is second nature — it’s literally what a pre-mortem or a failure-mode analysis is. You imagine the system has already crashed and work backwards to the cause. The Buffett insight is that the same move works for careers, relationships, and money, not just distributed systems.

The one-line takeaway

You don’t need a map of every road to success. You need a map of the cliffs — and the discipline to not drive off them.

Next in the series: more borrowed wisdom, one mental model at a time.