23. March 2026

First Principles Thinking and Why It Changes How You Solve Problems

Most people solve problems by looking at what worked for someone else and copying it. It is fast, it is easy, and most of the time it is good enough.

But good enough has a ceiling. And a lot of what people copy was never based on sound reasoning in the first place. It was just what everyone else was doing.

First principles thinking is a different approach. Instead of starting with convention, you strip a problem down to what is fundamentally and undeniably true, and build your solution from there.

What It Actually Means

A first principle is something you know to be true independent of assumption or convention. It cannot be broken down further. Everything else is built on top of it.

The goal of first principles thinking is to separate what is actually true from what you inherited, assumed, or accepted without questioning. Once you have only the fundamental truths left, you build your answer from the ground up using logic rather than convention.

How to Do It

The process comes down to four steps.

1. Start by asking what you know to be true about the problem. Not what you have been told, not what the industry does, just what you can verify as fact.
2. Then ask why repeatedly until you cannot go any further. Every time you hit an assumption, push through it. Keep going until you reach something that is true regardless of context or convention.
3. Then challenge everything that did not survive that process. If a belief or practice exists only because it always has, it is not a first principle. It is folklore.
4. Finally, rebuild. Create your solution using only what passed the test. Ignore what everyone else does unless it is grounded in something fundamentally true.

Why Elon Musk Builds Rockets

When Musk wanted to send a rocket to Mars, he was quoted an astronomical price for a rocket. Instead of accepting it, he asked different questions.

What is a rocket actually made of? Aerospace grade aluminum, titanium, copper, carbon fiber.

What do those materials cost on the open market? Significantly less than the price he was being quoted.

So he started SpaceX and built the rockets himself.

He applied the same thinking to batteries for Tesla. He broke it down to the raw materials, bought them separately, and drove the cost down to a fraction of what anyone thought possible.

He did not find a better supplier. He questioned whether the assumption was true in the first place.

Here's a 3 minute video of Elon Musk explaining first principles thinking.

What This Looks Like in a Small Business

Most service businesses charge by the hour because that is what everyone else does. But if you break it down to first principles, what is the client actually paying for? The outcome. Not your time.

A plumber who fixes a leak in 20 minutes delivers the same value as one who takes two hours. Charging by the hour incentivizes the plumber to finish slower. That is not what you want.

The hourly pricing model is not a fundamental truth. It is a convention inherited from a time when time was the only measurable input. Question it and an entirely different pricing model becomes available.

This applies to almost every aspect of how a business operates. Why do you hire full time employees instead of specialists? Why do you offer the services you offer? Why do you price the way you price? Why do you market on the channels you market on?

Most of the answers trace back to convention, not truth. First principles thinking is how you find them.

Why It Matters

The biggest opportunities in any business are usually hiding behind assumptions nobody ever questioned. Pricing, hiring, operations, marketing.

The businesses that grow fastest are not always the ones working hardest. They are often the ones who stopped and asked whether the way things have always been done is actually the best way.

Want help applying this kind of thinking to your business? We have a few open slots for a free strategy call. Apply here.