He picked a name from a British textbook publisher, drew himself as a stick figure, and quietly built an animation studio of one - the kind people teach civics with.
There is a man in London who refuses to be photographed and yet has been watched, in some form, more than a billion times. He calls himself CGP Grey. The initials are a private joke - they belong to Coordination Group Publications, the British exam-revision house whose textbooks he relied on while teaching physics to teenagers. The name stuck. The face never appeared. The internet shrugged and pressed play.
What it pressed play on was a stick figure with glasses, narrating, briskly and politely, why the US penny is an economic insult; why the City of London is technically a different country; why becoming Pope is more bureaucratically interesting than becoming President. The videos are short. The research is not. He has, on more than one occasion, rewritten a script for a year before recording it.
He grew up on Staten Island, a borough that has its own complicated relationship with the rest of New York. His father applied for Irish citizenship on his behalf as a child, which is how an American kid ended up with an Irish passport and, eventually, a London postcode. He studied physics. He also studied sociology. He then started a master's in economics, because once you have committed to explaining the world, you may as well bring receipts.
He taught for a while. Then, around 2010, he started uploading explainers to YouTube. The first hits were small, sharp, and impossible to look away from: the difference between the United Kingdom, Great Britain, and England; the difference between Holland and the Netherlands; the difference between, well, almost any two things you'd assumed were the same. Geography teachers found him. Civics teachers found him. Bored office workers found him at 2pm on a Wednesday.
By 2014, two things happened in quick succession. He released "Humans Need Not Apply", a fifteen-minute essay on automation that did not flatter the viewer, and he co-founded a podcast with Brady Haran of Numberphile called Hello Internet. The podcast was about almost nothing - flag design, time zones, the etiquette of being a vegetarian at dinner parties - and it went to number one on iTunes in five countries in February of that year. The Guardian later put it on its best-of-the-decade lists. It has been on quiet hiatus since 2020.
Then came Cortex, the show he started in 2015 with Myke Hurley of Relay FM, ostensibly about productivity but really about the strange weather inside a creative person's head. For ten years, Grey used it as an open window into his own working life - his task managers, his calendars, his pen obsession, his year-long script rewrites. In 2025 he stepped back from co-hosting. The internet, predictably, has opinions about when he might return.
This is the part where most profiles start hyping the man. We won't. The work is the hype. The work is also the point.
The initials are not his. CGP belongs to Coordination Group Publications, a British educational publisher whose orange-and-yellow revision guides are scattered across every Year 11 desk in the country. Grey, then a physics teacher in London, took the name as a small, dry homage. Then he never explained it on camera.
This is a useful clue about the person. He likes systems, conventions, and quiet jokes that you only get if you're paying attention. His videos run on the same logic. The throwaway frame is often the punchline.
Before YouTube, he taught physics in London. The internet has spent fifteen years trying to verify which school. He has not helped. What's verifiable is that his first explainer videos look exactly like a teacher's whiteboard sketches, optimised for the kid who refuses to read the chapter. Death to Pennies. How to Become Pope. The Electoral College. The City of London. He found his lane: civic plumbing, drawn in lines and circles.
Released in August 2014. Fifteen minutes long. About the labour-market implications of automation. It is, by some distance, the most-shared video he ever made. It also predates the current AI panic by about a decade. He was talking about horses-replaced-by-cars as a parable for software-replacing-knowledge-workers while the rest of the internet was still arguing about Vine.
The video has aged the way a careful thing tends to age. Quietly. Stubbornly. Mostly correctly.
Hello Internet was a freeform podcast with Brady Haran. Cortex was a working-process podcast with Myke Hurley. Together they did something strange: they made the inside of a single person's creative practice into a kind of long-running serialised drama. The flag debates. The pen reviews. The yearly themes. The annual New Year planning episode. For a generation of independent creators, Cortex is the closest thing to a trade journal.
The video that put him on civics-teacher reading lists worldwide.
2012 - CatholicismBureaucracy explained with the patience it deserves.
2014 - AutomationFifteen minutes that aged unsettlingly well.
2018 - ParableAn animated adaptation of Nick Bostrom. Tens of millions of views.
2019 - NeuroscienceMade with Kurzgesagt. Brain lateralisation gets weird.
CatalogueThe full channel - Death to Pennies, Electoral College, the City of London, etc.
Teaches physics in London. Encounters CGP revision guides. Files name away for later.
Launches the CGP Grey YouTube channel.
"UK vs Great Britain vs England" goes mildly viral, then permanently viral.
"How to Become Pope" lands. Vatican bureaucracy gets a stick-figure makeover.
Co-launches Hello Internet with Brady Haran.
Hello Internet hits #1 on iTunes in UK, US, Germany, Canada and Australia.
"Humans Need Not Apply" arrives. Discourse follows for years.
Cortex begins on Relay FM with Myke Hurley.
The Guardian lists Hello Internet in its 50 best podcasts of the year.
Releases the animated "Fable of the Dragon-Tyrant".
Collaborates with Kurzgesagt on "You Are Two".
Hello Internet quietly goes on indefinite hiatus.
Announces a break from Cortex after roughly a decade. Show shifts to interview format.
The bee emoji next to his name on Twitter is a long-running Hello Internet joke about flag design and personal symbology. New listeners spend whole episodes trying to catch up.
He has been known to redraft a single script for over a year before recording it. Cortex listeners have followed the agony in close to real time.
Two dots for a face, a pair of rectangular glasses, four limbs. No upgrades in fifteen years. The animation style apparently borrows in spirit from Yahtzee Croshaw's Zero Punctuation.
American by birth, Irish by paperwork. The dual citizenship made moving to London more or less paperwork-light.
Cortex's signature ritual: instead of resolutions, a single guiding word for the year. Whole productivity subcultures have copied it.
His shortest videos often have the longest source lists. Civics teachers borrow them; political scientists fact-check them; he keeps a quiet errata page.
This video is about the difference between the United Kingdom, Great Britain, England, and a lot of other things.
- CGP Grey, opening of UK explainer, 2011You may think you don't have anything in common with a horse, but listen - you do.
- CGP Grey, Humans Need Not Apply, 2014