Dark Corners History Tried to Leave Behind

History tends to save its warnings for the names everyone already knows, but some of the most disturbing people were actually the ones hidden in the margins of textbooks. These weren’t simply “bad people” in some abstract sense, either; they were men and women who betrayed, exploited, or ended the lives of real people while systems around them looked away…or actively helped them. Here are 20 villains who don't get discussed enough, even though their actions deserve a much colder place in your memory.

Unknown author on Wikimedia

1. Gilles de Rais

Gilles de Rais had the kind of résumé that can mislead you if you stop reading too early. On paper, he fought beside Joan of Arc and became a marshal of France. In reality, by the late 1430s, accusations mounted that he had abducted, tortured, and ended the lives of children at his castles in western France. He was eventually executed in 1440.

Éloi Firmin Féron on Wikimedia

2. Shiro Ishii

Shiro Ishii wasn’t just a wartime doctor—he built an entire system around turning human beings into test subjects. As the head of Japan’s Unit 731 (which is its own insane chapter from history), he oversaw experiments in occupied Manchuria that included frostbite testing, plague exposure, and other forms of biological warfare research on prisoners. What makes it arguably worse is that he escaped trial after World War II because American authorities wanted access to his research.

Unknown Author on Wikimedia

3. Oskar Dirlewanger

There’s really only one thing to know right off the bat about Oskar Dirlewanger: he was so violent that even other Nazi officials viewed him as a liability. His SS penal unit became infamous for atrocities against civilians, including the savage suppression of the Warsaw Uprising in 1944. His story doesn’t get discussed as often as that of higher-ranking leaders, but few figures better represent savage cruelty.

Ahrens, Anton on Wikimedia

4. Jean-Baptiste Carrier

Jean-Baptiste Carrier turned revolutionary violence into a spectacle during the Reign of Terror, especially in the city of Nantes. He essentially became notorious for the “noyades,” mass drownings in which prisoners, priests, women, and suspected royalists were loaded onto boats and sunk in the Loire River. We know that the French Revolution had plenty of ruthless men, but Carrier’s particular stunts feel uniquely grotesque.

Unknown author on Wikimedia

5.Vasily Blokhin

Okay, sure, Blokhin wasn’t famous for giving speeches or leading armies, but his work still made him one of the deadliest executioners of the Soviet state. As an NKVD officer, he personally carried out thousands of killings, including those connected to the Katyn massacre of Polish officers in 1940. You rarely hear his name stacked against other villains, but his career earns him a spot on more radars.

Author of this photo is unknown person. on Wikimedia

6. Delphine LaLaurie

Delphine LaLaurie moved through New Orleans society as a wealthy and respectable woman, but don’t let that fool you. If anything, that made the truth about her even more disturbing. After a fire broke out at her mansion in 1834, rescuers discovered enslaved people who had been mistreated and confined in horrifying conditions. For someone whose name survives mostly in ghost-tour storytelling, it’s worth acknowledging that she was a real-life monster.

Unknown author on Wikimedia

7. Matthew Hopkins

Matthew Hopkins styled himself as a “Witchfinder General,” which should tell you enough right out of the gate. During the English Civil War, he helped drive a wave of witch trials across East Anglia, using sleep deprivation, forced watching, and other coercive methods against mostly vulnerable women. His career may have been brief, but the damage was real.

Fæ on Wikimedia

8. Konrad von Marburg

Konrad von Marburg built his reputation as a fierce religious inquisitor in 13th-century Germany, and his methods made him feared far beyond everyday church discipline. He pursued alleged heretics with a harshness that relied on everything from accusation and pressure right up to punishment rather than careful justice. His assassination in 1233 was what finally ended his career.

McLeod on Wikimedia

9. William Burke

If you’ve heard of burking before, you already know about William Burke—even if you don’t think so. The thing is, he didn’t just rob graves for the anatomy trade; he helped create fresh corpses for profit. In 1828, he and William Hare took the lives of their own victims in Edinburgh and sold the bodies to anatomist Robert Knox, exploiting the demand for cadavers in medical education. Burke was hanged in 1829 for it.

George Andrew Lutenor; a portrait painter who was also one of the jurors at William Hare's trial (see Burke and Hare murders) on Wikimedia

10. Edward Low

When you hear that Edward Low was a pirate, that can make him sound more whimsical than he deserves. We’re not talking about a Jack Sparrow type, here. In the early 18th century, he developed a reputation for extreme sadism, torturing captives and terrorizing crews even by the already violent standards of Atlantic piracy. As for what happened to him, no one really knows. The main possibilities are that he was either set adrift by his own crew or hanged in Martinique.

Anonymous 19th century artist on Wikimedia

11. François l’Olonnais

François l’Olonnais became one of the most feared buccaneers of the 17th century, and his reputation came more from cruelty than anything else. He attacked Spanish settlements and prisoners with extraordinary violence, with accounts describing torture used to extract information and further spread terror. He reportedly met a brutal end around 1668 after being shipwrecked near Panama. Indigenous Kuna fighters captured him and allegedly took his life in a not-so-neat way.

Alexander Exquemelin on Wikimedia

12. Gaius Verres

Gaius Verres may not sound like a frightening battlefield butcher, but as it turns out, corruption can destroy lives. As Roman governor of Sicily in the first century BC, he was accused of extortion, theft, abuse of power, and plundering temples, farmers, and cities under his authority. His prosecution became famous, but he fled into exile rather than face trial.

Federico Galassi on Pexels

13. John Chivington

John Chivington had once been celebrated as a Union officer, but his name has a bigger stain on it than people talk about nowadays. In 1864, his Colorado troops attacked a Cheyenne and Arapaho village, killing many people, including women and children, despite signs that the camp believed it was under U.S. protection. Even back then, the massacre was condemned, but Chivington never faced any punishment.

Unknown author on Wikimedia

14. Amelia Dyer

Amelia Dyer presented herself as a caretaker for unwanted infants in Victorian England…and if you’ve made it this far, you know where this story is going. The reality is that she took in babies for payment, then took their lives, often targeting children whose mothers had few options and little protection. Her execution in 1896 helped expose the underside of “baby farming.”

Wells Asylum authorities, 1893 on Wikimedia

15. Mary Ann Cotton

Mary Ann Cotton moved through 19th-century England, leaving a suspicious trail of dead husbands, children, and relatives behind her. It was already weird enough to authorities, and once they started digging, she was later convicted of poisoning her stepson with arsenic. What’s worse, investigators and later historians have connected her to even more suspected deaths.

Ganjar Arya on Pexels

16. Ranavalona I

Ranavalona I of Madagascar remains a particularly difficult figure; colonial writers often portray her as barbaric, but how much of it was embellished remains up for debate. During her rule from 1828 to 1861, persecution, military campaigns, and brutal ordeals contributed to plenty of suffering among her subjects. She resisted foreign domination, which complicates the story, but that also came under a ruler whose power could turn suspicion into death.

Philippe-Auguste Ramanankirahina (1860-1915) on Wikimedia

17. Ante Pavelić

Ante Pavelić led the Ustaše regime in the Nazi-aligned Independent State of Croatia during World War II, and his government carried out mass targeting against Serbs, Jews, and Roma. The concentration camp system under his rule, especially Jasenovac, became infamous for its brutality and personal savagery. There wasn’t even any justice; Pavelić escaped Europe after the war and died in exile.

Unknown Croatian photographer Probably photo by Willy Pragher on Wikimedia

18. Basil Zaharoff

Some people, like Basil Zaharoff, don’t need to rule a country to make the world a worse place. As a powerful arms dealer in the late 19th and early 20th centuries, he sold weapons across borders and profited from instability in places where ordinary people paid the real price. He died quietly in 1936 in Monaco, immensely wealthy and decorated despite his career. 

Agence de presse Meurisse on Wikimedia

19. Josef Mengele

Josef Mengele is hardly a hidden figure, but the full reality of his crimes still gets flattened. At Auschwitz, he selected prisoners for death and carried out medical experiments, especially on twins, without consent. Children weren’t protected, either, and he also targeted disabled people without anesthesia. He then escaped to South America after the war and never stood trial.

Bernhard Walther or Ernst Hofmann or Karl-Friedrich Höcker on Wikimedia

20. Luis Garavito

Despite belonging to more recent history, Luis Garavito is still missing from broader conversations about the worst criminals. In Colombia during the 1990s, he preyed on vulnerable boys, many of them poor or homeless, and confessed to ending a large number of children’s lives. His case is almost too grim to discuss, which might be exactly why it doesn’t get brought up.

The Colombian National Police (Policía Nacional de Colombia) on Wikimedia