The Search for a Theory of Everything
Understanding the Complex: Why has physics spent a century searching for one theory that explains everything — and what would it mean to find it? 11 lessons, ~150 minutes, free.
The Search for a Theory of Everything
All 11 lessons in order.
What's This Actually About?
Hook: the Higgs boson confirmed the Standard Model in 2012 — and the Standard Model is still incomplete. Why Einstein spent 30 years searching and failed.
Why Should I Care?
Three reasons a Theory of Everything matters beyond academic curiosity.
The Basics You Need
Prerequisites: the four forces, the Standard Model as an incomplete map, what 'unification' means. Anchor: symmetry breaking as a phase transition.
The Unifications That Worked — And What's Still Missing
Maxwell 1865, electroweak unification 1967, the Higgs mechanism. What makes gravity so resistant to unification?
The Candidates — String Theory, Loops, AdS/CFT
String theory, loop quantum gravity, AdS/CFT — core ideas, strengths, weaknesses. Hossenfelder's 'Lost in Math' critique.
What If We Found It? What If We Never Do?
What if we found it? What if we never do? The falsifiability problem. The string landscape. Anchor resolved.
Who's Doing This? Why? Who's Paying?
Witten, Randall, Greene, Hossenfelder, Woit, Rovelli, Maldacena, Maxwell, Glashow/Salam/Weinberg. CERN, NSF, Simons Foundation. As of May 2026.
What's Contested? What Don't We Know?
Three controversies: Is string theory physics or math? Is there a ToE at all? Is the string landscape science?
What's Next?
Five milestones for the search over the coming decades.
What If...?
Unusual Lesson 10: not risks but consequences — what would it mean to find it, or to permanently fail?
What Do You Take Away?
Six core ideas. Reading list. Cross-links to Relativity and Nuclear Fusion. Why you shouldn't trust us blindly.