Jeff Hawkins: Neuroscientist, Numenta co-founder, and author of On Intelligence and A Thousand Brains. He earlier co-founded Palm Computing and now studies the structure and function of the neocortex.
What this episode covers
Jeff Hawkins lays out his Thousand Brains Theory: the neocortex contains roughly 150,000 cortical columns, each an independent modeling system that uses reference frames to learn a model of the world, with a voting mechanism producing our singular perception. He argues intelligence is the ability to learn a predictive model through movement, and that prediction happens inside individual neurons via dendritic spikes. Hawkins contends existential AI fear is misplaced because intelligence does not entail human desires or self-preservation; the real danger is self-replication. The conversation ranges across uploading minds, brain-machine merger, preserving and broadcasting human knowledge to future or alien civilizations, the origin of intelligence, and how passion and acquiring knowledge give life meaning.
The guest's own work
On Intelligence
Jeff Hawkins
“he previously wrote the seminal book on the subject titled on intelligence and recently a new book called a thousand brains”— Lex Fridman
A Thousand Brains: A New Theory of Intelligence
Jeff Hawkins
“a new book called a thousand brains which presents a new theory of intelligence that richard dawkins for example has been raving about”— Lex Fridman
Also referenced (named, not recommended)
On the Origin of Species
Charles Darwin
“looking at parallels for your book and darwin's origin of species so darwin wrote about the origin of species so what is the origin of intelligence”— Lex Fridman
Fiji Water
Fiji
“i'm not particular to this brand but this is a fiji water bottle and it has um a logo and i use this example in my book”— Jeff Hawkins
Scientific American (September 1979 issue on the brain)
Scientific American
“i was reading uh the september issue of scientific american which is all about the brain and then the final essay was by francis crick”— Jeff Hawkins
Big reveals from this episode
- Hawkins reframes the brain as not one model but tens of thousands of independent cortical-column modeling systems voting to form a single perception.
- He claims most predictions happen inside individual neurons via dendritic spikes, not by neurons firing in advance.
- Hawkins argues an intelligent machine can deeply model the world yet have zero desire to live, so existential AI fear conflates intelligence with evolved animal drives.
- He identifies self-replication, not intelligence, as the true existential risk to worry about.
- He says uploading your mind is far off and you wouldn't like the result, since the copy would feel like you while you still sit there mortal.
- He argues the hardest part of brain-machine merger is not the surgery but decoding billions of neural signals.
- Numenta has applied brain principles like sparsity to speed up deep learning networks by 10 to 100 times while making them more robust.
- Hawkins proposes archiving Wikipedia on satellites and broadcasting a star-dimming signal so future or alien civilizations know we were once here.
Worth remembering
- The neocortex is a repetitive sheet of neural tissue making up about 75 percent of the brain's volume, running one common algorithm.
- The theory holds the cortical column was repurposed from the hippocampus/entorhinal grid-cell mapping system, genericized to model anything.
- Each cortical column is like a grain of rice containing about 100,000 neurons yet can learn hierarchical objects.
- Vernon Mountcastle discovered a single cortical algorithm underlies everything the neocortex does.
- The Wright brothers' real innovation was wing-twisting for controlled flight, copied from birds, not the propeller.
- If humanity vanished, after enough time we'd find dinosaur bones but no evidence of a prior human-like civilization.
- Hawkins says the neocortex can be understood without modeling emotions like fear; love and emotion live in older brain regions.
- As a teenager Hawkins listed four great problems and chose intelligence; a 1979 Francis Crick essay in Scientific American set him on the path.
- His personal philosophy: an individual can only accelerate the inevitable, making a beneficial future arrive sooner.