5 Irish People Who Changed the World — And Were Erased From History

Added: 2026-05-12

[00:00:00]Ireland has given the world some of the most famous names in history. Oscar Wilde, James Joyce, Bono, Samuel Beckett.

[00:00:08]Everyone knows them. Their faces are on murals. Their words are in textbooks.

[00:00:14]Their stories are told in every Irish pub from Dublin to Boston.

[00:00:18]But behind the famous names, there are Irish men and women who changed the world in ways most people have never heard of.

[00:00:25]And then were erased. Not deliberately in most cases. Just quietly. Their inventions were credited to someone else. Their discoveries were absorbed into the work of larger institutions.

[00:00:37]Their names were dropped from the footnotes. Their contributions were filed under British or American or simply forgotten.

[00:00:45]These are five Irish people who changed the world and were erased from history.

[00:00:50]And the first one invented something you've used every single day of your life without ever knowing where it came from.

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[00:01:00]Because Ireland's greatest stories are the ones nobody told you.

[00:01:04]Number five, John Philip Holland, the father of the modern submarine.

[00:01:09]Every nuclear submarine patrolling the oceans right now, American, British, Russian, Chinese, traces its design back to a school teacher from County Clare.

[00:01:20]John Philip Holland was born in Liscannor in 1841, grew up speaking Irish, and trained as a teacher with the Irish Christian Brothers. But his obsession was building a boat that could travel underwater.

[00:01:34]He immigrated to America in 1873 and spent the next three decades designing, building, testing, and sinking prototype submarines. Six of them before finally getting it right.

[00:01:46]His first attempt, the Holland One, was a one-man vessel he tested in the Passaic River in New Jersey. It sank. He built another and another. The Fenian Ram, funded by Irish Republicans who hoped the submarine might one day be used against the British Royal Navy, was his most ambitious early design, but the Fenians stole it from him during a dispute over money and it ended up in a shed. Holland kept going. His submarine, the Holland VI, was purchased by the United States Navy in 1900 and became the USS Holland, the first submarine ever commissioned by the US military.

[00:02:24]The British Royal Navy bought his design, too. So did the Japanese.

[00:02:29]Holland's basic concept, a streamlined hull, internal combustion engine on the surface, electric motor underwater, became the template for every submarine built in the 20th century. Within a decade, the major navies of the world were building submarine fleets based on his work. He changed naval warfare forever. He gave nations the ability to project power invisibly beneath the ocean, and for that, he was rewarded by having his own company stolen from him.

[00:03:00]His financial backers, led by a businessman named Isaac Rice, squeezed him out of the Holland Torpedo Boat Company, renamed it Electric Boat, and made millions from his designs while Holland tried and failed to start over.

[00:03:14]He filed lawsuits. He lost. He spent his final years in a modest apartment in Newark, New Jersey, watching other people profit from his life's work. He died on August 12th, 1914, the same month the First World War began, a war in which submarines would prove to be one of the most decisive weapons. The father of the modern submarine died forgotten in a country that used his invention to reshape the world. Number four, Francis Rend, the man who invented the hypodermic needle.

[00:03:48]Every injection you've ever had, every vaccination, every blood test, every dose of insulin, every every shot of anesthetic before surgery. All of it traces back to a Dublin doctor named Francis Rynd.

[00:04:02]In 1844 at the Meath Hospital in Dublin, Rynd performed the first subcutaneous injection in medical history, delivering a solution of morphine directly beneath the skin of a patient suffering from excruciating facial neuralgia using a hollow needle he designed himself.

[00:04:19]The patient, a woman named Margaret Cox, had been in agony for years. No treatment had worked. Rynd's injection relieved her pain almost immediately. He published his results in the Dublin Medical Press.

[00:04:33]The medical world took notice, briefly.

[00:04:36]Then, a few years later, a Scottish doctor named Alexander Wood developed a similar device, published more widely in more prominent journals, and got the credit.

[00:04:46]Today, if you search for who invented the hypodermic needle, most sources will tell you Alexander Wood. Some will mention Rynd in a footnote. A few won't mention him at all.

[00:04:58]The Meath Hospital where he performed the first injection is still operating in Dublin.

[00:05:03]And there's nothing inside it to commemorate what happened there. No plaque, no display, no acknowledgement that the most commonly used medical device in the world was first used within its walls. But the documented fact is clear, and Rynd did it first in Dublin in 1844.

[00:05:21]Every needle that has ever punctured human skin since owes its existence to a doctor from the Meath Hospital whose name was quietly erased from his own invention.

[00:05:30]Number three.

[00:05:32]John Tyndall.

[00:05:34]The man who explained why the sky is blue. Look up.

[00:05:38]If there's blue sky above you right now, you're looking at something that was first explained by an Irishman from County Carlow, and almost nobody knows it.

[00:05:47]John Tyndall was born in Leighlin Bridge in 1829, the son of a local policeman. He became one of the most important physicists of the 19th century. He was the first person to correctly explain why the sky is blue. Short wavelength blue light is scattered by molecules in the atmosphere more than other colors, a phenomenon now called the Tyndall effect. But that was just the beginning. Tyndall was also the first scientist to demonstrate the greenhouse effect, proving that certain gases in the atmosphere trap heat from the sun.

[00:06:20]Every conversation about climate change, every carbon emission report, every international climate summit traces back to an experiment conducted by an Irishman in the 1850s.

[00:06:32]He also built the first device that transmitted light through a curved stream of water, the principle behind every fiber optic cable on the planet. Every time you stream a video, make a phone call, or send a message, you're using technology that Tyndall demonstrated in a laboratory over 160 years ago.

[00:06:51]And on top of all that, he helped prove germ theory, the idea that disease is caused by microscopic organisms rather than bad air, by showing that sealed flasks of boiled broth remained sterile while exposed ones grew contaminated. He made four of the most important scientific discoveries of his century.

[00:07:11]Blue sky, climate science, fiber optics, germ theory. Any one of those would make a scientist immortal.

[00:07:20]Tyndall made all four, and most people have never heard his name. He's not in the school curriculum.

[00:07:25]He doesn't have a statue in London, where he did most of his work. There's no Tyndall prize, no Tyndall Institute at a major university.

[00:07:34]The man who told the world why the sky is blue and warned it about greenhouse gases 170 years before anyone else was paying attention has been quietly absorbed into the general history of science, credited, if at all, in footnotes that nobody reads. He died in 1893 after his wife accidentally gave him an overdose of chloral hydrate. Even his death was a footnote. Number two, Dr. Vincent Barry, the man who cured leprosy.

[00:08:02]Leprosy was one of the most feared diseases in human history.

[00:08:06]For thousands of years, it disfigured, disabled, and killed millions of people across every continent. Lepers were cast out of communities, forced into colonies, and left to die in isolation.

[00:08:19]The disease was considered incurable.

[00:08:22]Then, a quiet biochemist from Cork changed everything.

[00:08:27]Vincent Barry was born in 1908 and studied at University College Dublin before joining the Medical Research Council of Ireland.

[00:08:35]In the 1960s, working in a small laboratory in Trinity College Dublin, with limited funding and almost no international recognition, Barry and his team began testing a compound called B663, later renamed clofazimine.

[00:08:51]It had been sitting on a shelf for years. Nobody had thought it was worth investigating. Barry did.

[00:08:58]He tested it against Mycobacterium leprae, the bacterium that causes leprosy, and discovered it was devastatingly effective. Not just effective, it was cheap to produce, it had manageable side effects, and it could be combined with other drugs for even greater impact.

[00:09:16]The World Health Organization adopted clofazimine as part of its multi-drug therapy for leprosy in 1981.

[00:09:24]Since then, the treatment has cured over 16 million people worldwide.

[00:09:29]16 million human beings who would have suffered disfigurement, disability, blindness, and a lifetime of social exile were saved by a drug developed by a man from Cork working in a Dublin lab that most people in the city didn't even know existed. Barry received almost no international recognition during his lifetime.

[00:09:48]He was nominated for the Nobel Prize but never won.

[00:09:52]He died in 1975, 6 years before the WHO adopted his drug and began saving millions of lives with it.

[00:10:01]The man who effectively cured one of the oldest and most feared diseases in human history died without knowing the full impact of what he'd done.

[00:10:10]His laboratory at Trinity College has no plaque.

[00:10:13]His name appears on no building. If you walked past the spot where leprosy was cured, you wouldn't know it. The 16 million people who are alive and whole today because of Vincent Barry's work have never heard his name. That's not tragedy. That's erasure.

[00:10:30]Number one, Charles Parsons. The man who powered the world and finally, the most consequential Irish invention that almost nobody attributes to Ireland.

[00:10:39]Every power station on Earth, every nuclear reactor, every coal-fired plant, every ship in the Royal Navy, every aircraft carrier in the United States fleet, all of them use the same fundamental technology, the steam turbine.

[00:10:53]And the steam turbine was invented by an Irishman named Charles Parsons from Birr, County Offaly.

[00:11:00]Parsons was born in 1854 into a remarkable family. His father, the third Earl of Rosse, built the largest telescope in the world at Birr Castle.

[00:11:11]Charles inherited the engineering gene and then some.

[00:11:15]In 1884, working in Newcastle upon Tyne, he designed and built the first reaction steam turbine, a device that converted steam pressure into rotational energy with unprecedented efficiency. His turbine could generate electricity more reliably, more cheaply, and at greater scale than any existing technology.

[00:11:37]It was the breakthrough that made widespread electric power possible.

[00:11:42]Without Parson's turbine, there would be no national power grid, no electric lighting in every home, no refrigeration, no modern hospitals, no internet servers.

[00:11:53]The entire electrical infrastructure of the modern world rests on a device invented by a man from a castle in the Irish Midlands. But Parsons wasn't done.

[00:12:03]In 1897, he built a ship called the Turbinia and pulled off one of the greatest publicity stunts in engineering history.

[00:12:12]He gate-crashed the Royal Navy's Diamond Jubilee Fleet Review at Spithead, the most prestigious naval event in the world, attended by Queen Victoria herself.

[00:12:22]Without permission, without invitation, and without apology, the Turbinia tore through the assembled fleet at over 34 knots, faster than anything the Navy had ever seen.

[00:12:34]Patrol boats tried to intercept it. They couldn't get close.

[00:12:38]The Navy was furious. Then, they were humiliated. Then, they were impressed.

[00:12:44]Within years, the Royal Navy had adopted Parson's turbine technology for its warships. The Dreadnought, the revolutionary battleship that changed naval warfare and triggered an arms race that led to the First World War, was powered by Parson's turbines. So was the Titanic. So was the Lusitania. So was virtually every major warship and ocean liner built in the first half of the 20th century. Charles Parsons powered the modern world. His turbines generated the electricity that lit the 20th century. His engines drove the ships that won two world wars.

[00:13:20]By the time of his death in 1931, his company had built turbines with a combined output of over 1 and 1/2 million kilowatts, enough to power entire cities. He was knighted. He was elected to the Royal Society.

[00:13:33]But ask anyone today who made the modern electrical world possible, and they'll say Edison or Tesla or Westinghouse.

[00:13:40]They won't say Parsons. They won't say Ireland.

[00:13:43]And if you asked a hundred people on the street who invented the steam turbine, 99 of them wouldn't have a clue.

[00:13:50]The hundredth might guess it was British. It wasn't. It was Irish. From Birr, County Offaly.

[00:13:57]A town most people couldn't find on a map. Five people.

[00:14:01]A school teacher from Clare who gave the world the submarine and had it stolen from him. A Dublin doctor whose needle is in every hospital on Earth and whose name was replaced by a Scotsman's.

[00:14:13]A physicist from Carlow who explained the sky, predicted climate change, and invented fiber optics.

[00:14:20]And died from an accidental overdose administered by his own wife.

[00:14:24]A biochemist from Cork who cured leprosy and died before the world even noticed.

[00:14:30]And an engineer from Offaly who powered the entire modern world and was forgotten because people assumed he must have been British. All Irish. All erased. All still waiting for someone to tell their story.

[00:14:42]Ireland didn't just give the world poets and musicians. It gave the world the submarine, the needle, the science of climate, the cure for leprosy, and the engine that powers civilization.

[00:14:54]And then the world said thank you by forgetting where it all came from.

[00:14:58]If this video introduced you to someone you'd never heard of, subscribe to Dust and Stories. We tell the stories that Ireland gave the world and that the world forgot to credit. Like the video.

[00:15:11]Drop a comment telling us which name surprised you the most. And thank you for watching. We'll see you in the next one.

[00:15:37]>> Mhm.