Third Brain

We help humans flourish in the age of AI by thinking positive-sum, growing deliberately, and seeking truth in good faith—together

[Third Brain @bethirdbrain]

The person who disagrees with you might be your most valuable thinking partner. En garde!

#SparIntellectually

[Third Brain @bethirdbrain]

This will go down as one of the most consequential photos in human history.

Religion has officially taken a back seat to (or, merged with?) technology

[Third Brain @bethirdbrain]

This is why Third Brain exists. To help humans flourish in the age of AI as we face rapid changes to the social contract of what it means to be human

[Elon Musk @elonmusk]

Where will AI be in 1, 2 or 3 years?

[Third Brain @bethirdbrain]

Clear Thinking → enables → Holistic Growth → validated through → Objective Truth

[Third Brain @bethirdbrain]

When godlike technology meets Paleolithic emotions and instincts, we get...

[Third Brain @bethirdbrain]

"‘Clear thinker’ is a better compliment than ‘smart.’" - @naval

Clear thinking is one of Third Brain's three pillars for living a fulfilling life in the age of AI

[Third Brain @bethirdbrain]

How should we think in the Age of AI?

[BrianL @b__lowey]

@bethirdbrain Super cool to see how these mental models relate and that they can be used as a sort of proof for the claim that clear thinking powers personal growth

[Third Brain @bethirdbrain]

You were born with three brains.

Your brain's three layers are a blueprint for holistic health in life:

- Reptilian needs [Brain Stem & Cerebellum] = Physical Health (survival; ego, instincts)
- Mammalian needs [Limbic System] = Mental + Social Health (safety, belonging; emotions (self\others))
- Human needs [Neocortex, esp. Prefrontal Cortex] = Spiritual Health (meaning, self-actualization; logic, reason, temporal planning)

Master clear thinking → level up across the board.

These are laws of metaphysics.

[Third Brain @bethirdbrain]

@r0ck3t23 In a code-abundance world, humans will need a stronger internal compass to find meaning and purpose as products and marketing converge

[Third Brain @bethirdbrain]

@paulg Do you not think that Elon buying X was to save free speech on the internet/across the world?

[Third Brain @bethirdbrain]

@Knight1317747 @DaveShapi @dwarkesh_sp @pawtrammell Agreed! We'd love your help to make this happen...would you consider signing and sharing this official nomination page? -> https://t.co/JYRgKWFW2h

[Third Brain @bethirdbrain]

@athinkybrain @DaveShapi @dwarkesh_sp @pawtrammell Heck yeah we agree, they're both cognitive firepowers.

We'd love your help to make this happen...is it crazy to ask you to add your vote and share this official nomination page? -> https://t.co/JYRgKWFW2h

Truly think this would be an episode for the ages!

[Third Brain @bethirdbrain]

We think so too! (We're also big fans of David and Dwarkesh.)

Is it crazy to ask if you'd add your vote to the official nomination page (below) and share it with others who'd want this episode to happen too?

We'd really love to see this happen and your help would go a long way

https://t.co/sTzsoMTtSp

[Third Brain @bethirdbrain]

@b__lowey @MetaPrime001 Well said! The Triune Brain Theory is the 0th principle mental model that helps explain the laws of nature, particularly metaphysics

[Third Brain @bethirdbrain]

Third Brain has discovered laws of metaphysics, which say that pursuing the three positive-sum pillars––clear thinking, personal growth, and objective truth––will lead to increasing happiness and life satisfaction over the long-run

[Third Brain @bethirdbrain]

Yes. Come SparkUp with us: https://t.co/h48Ye0XNAU

[Naval @naval]

The art of conversation is best practiced between three to four people.

[Third Brain @bethirdbrain]

On the Elon x Trump fallout:

People need to break free from the binary, two-party mindset—it’s limiting our collective understanding of political dynamics.

There isn’t just left and right. There’s also a center, what @balajis calls the Grey Tribe. Progressives and liberals (who are often mistakenly lumped together) represent different strands of the left. The right has its own internal factions. And the center is increasingly distinct—defined less by ideology and more by an ethos of independence, pragmatism, and systems-level thinking.

Elon (and to a degree, RFK Jr.) didn’t align with Trump out of personal loyalty or shared identity. It was a strategic alliance—a temporary convergence of interests aimed at resisting what they perceived as the overreach of an increasingly illiberal establishment left, especially around issues like free speech and institutional capture.

To many locked in red-vs-blue thinking, this alliance seemed confusing or hypocritical. But that’s only because they’re using a mental map that no longer reflects the terrain.

Politics—and culture more broadly—isn’t a tug-of-war between two poles anymore. It’s a multidimensional arena. And in that space, alliances shift not because of betrayal, but because of evolving threats and shared priorities.

The real problem isn’t Elon or Trump or even the breakup—it’s the inability of many to model a world beyond binaries.

The moment demands better mental frameworks. Not just left vs right. Not even just a “middle.” But a dynamic third space—a tertiary mindset—that understands coalitions, strategy, and systems as fluid.

If you’re not thinking in threes, you’re not really seeing the game clearly.

Tertiary thinking is the new literacy.

And Third Brain is home for the nuance-seekers of the Grey Tribe.

[Third Brain @bethirdbrain]

@Andercot "Made by Men with the power of Gods."

Yes, with the power of ASI.