WELCOME TO

THE ERA OF THE SOUL

WELCOME TO

THE ERA OF THE SOUL

WELCOME TO

THE ERA OF THE SOUL

Third Brain gives you the frameworks, tools, and community to think more clearly, grow holistically, and pursue truth with others — so you can thrive in the age of AI.

Third Brain gives you the frameworks, tools, and community to think more clearly, grow holistically, and pursue truth with others — so you can thrive in the age of AI.

Third Brain gives you the frameworks, tools, and community to think more clearly, grow holistically, and pursue truth with others — so you can thrive in the age of AI.

Download Third Brain's "How to Thrive in the Era of the Soul" Handbook for free

Download Third Brain's "How to Thrive in the Era of the Soul" Handbook for free

Download Third Brain's "How to Thrive in the Era of the Soul" Handbook for free

The Problem

WE HAVE GODLIKE TECHNOLOGY AND PALEOLITHIC EMOTIONS

WE HAVE GODLIKE TECHNOLOGY AND PALEOLITHIC EMOTIONS

WE HAVE GODLIKE TECHNOLOGY AND PALEOLITHIC EMOTIONS

Political polarization. Echo chambers. Zero-sum tribalism.


AI is transforming everything — but most people don't have the thinking frameworks, growth tools, or discourse skills to navigate what's coming.

Third Brain is building the infrastructure to change that.

The Solution

THREE PILLARS OF HUMAN FLOURISHING

THREE PILLARS OF HUMAN FLOURISHING

THREE PILLARS OF HUMAN FLOURISHING

Pursue these to thrive in the age of AI. Each pillar reinforces the others. Start wherever you are.

Pursue these to thrive in the age of AI. Each pillar reinforces the others. Start wherever you are.

Pursue these to thrive in the age of AI. Each pillar reinforces the others. Start wherever you are.

CLEAR THINKING

Learn the mental models for better decisions and becoming happier.

CLEAR THINKING

Learn the mental models for better decisions and becoming happier.

CLEAR THINKING

Learn the mental models for better decisions and becoming happier.

PERSONAL GROWTH

Track and improve holistically across the five dimensions of health.

PERSONAL GROWTH

Track and improve holistically across the five dimensions of health.

PERSONAL GROWTH

Track and improve holistically across the five dimensions of health.

OBJECTIVE TRUTH

Seek truth and be challenged through Socratic dialogue with curious minds.

OBJECTIVE TRUTH

Seek truth and be challenged through Socratic dialogue with curious minds.

OBJECTIVE TRUTH

Seek truth and be challenged through Socratic dialogue with curious minds.

Start Here

Start Here

YOUR GUIDE TO THRIVING IN THE ERA OF THE SOUL

YOUR GUIDE TO THRIVING IN THE ERA OF THE SOUL

YOUR GUIDE TO THRIVING IN THE ERA OF THE SOUL

Third Brain's free handbook gives you the philosophical foundation to navigate the age of AI with clarity and purpose.

Third Brain's free handbook gives you the philosophical foundation to navigate the age of AI with clarity and purpose.

Third Brain's free handbook gives you the philosophical foundation to navigate the age of AI with clarity and purpose.

Download Third Brain's "How to Thrive in the Era of the Soul" Handbook for free

Download Third Brain's "How to Thrive in the Era of the Soul" Handbook for free

Download Third Brain's "How to Thrive in the Era of the Soul" Handbook for free

The Bigger Picture

AI IS FREEING US TO FOCUS ON WHAT MATTERS MOST

AI IS FREEING US TO FOCUS ON WHAT MATTERS MOST

We're entering what Third Brain calls the Era of the Soul — a time when AI handles more of the busywork, and more people than ever can focus on becoming their best selves.


But most people don't have the thinking frameworks, growth tools, or discourse skills to navigate this shift.


That's why Third Brain exists. We're building the infrastructure to help you thrive — not just survive — in the age of AI.

@beThirdBrain

©

2026 Third Brain, PBC. All Rights Reserved.

Diversity of Thought. Free Speech. Radical Candor.

Positive-sum by design

@beThirdBrain

©

2026 Third Brain, PBC. All Rights Reserved.

Diversity of Thought. Free Speech. Radical Candor.

Positive-sum by design