Skip to content
Search AI Powered

Latest Stories

People Break Down Some Of The Biggest 'Necessary Evils' From History

The Black Death is notable for wiping out much of the population of continental Europe. It was a terrible, devastating, and protracted event that was no doubt traumatic for those who managed to survive it.

But did you know that it led directly to the average person having a say in how they are ruled? With a shortage of workers, peasants found themselves with considerably more bargaining power. Migration patterns changed and different towns and cities grew out of the wreckage.

It's wild to think about: If the plague had not happened, would we all still be serfs?

But the Black Death isn't the only historical event with a macabre silver lining. People shared their thoughts with us after Redditor follopie asked the online community,

"What are some of the 'necessary evils' of history?"

"Allowing some attacks..."

"Allowing some attacks to take place even after Hitler's Enigma encryption device was cracked by the English and they knew when and where the attacks would occur. They could only act on the intelligence to thwart attacks if they could quickly come up with an alternate way to find out which the Germans would find believable."

wanted-to-upvote

To which this person replied:

"Neal Stephenson's book Cryptonomicon really does a great job of explaining this concept. Bounces back and forth between WWII and current day (well, ten or so years ago) drawing parallels between cryptography at the beginning of computers and encryption now."

countryhacker

"The only ways schools could get human bodies legally..."

"Body snatching in the 19th century."

"Medical schools would illegally buy human bodies that were dug up from graves in order to study anatomy and teach medical students in secret, because at the time it was illegal and not acceptable to use human bodies for Science or education purposes."

"The only way schools could get human bodies legally was from death-sentenced people who also had been condemned to dissection on top of that by the courts, which was very rare and couldn't supply enough bodies for medical schools."

"So there was a literal black market of dead bodies and the body snatchers would risk death penalty themselves to make profit from digging up bodies that were freshly buried. The bodies of young adult people were particularly sought after and expensive."

"But it also allowed scientists and students to learn about anatomy and improve surgery techniques, which allowed medicine as a whole to make a lot of progress and saved many lives in the end."

cocOtte

To which this person replied:

"This reminds me of the ethics dilemma around the use of data acquired from Nazi human experimentation. Or data acquired from 'testing' at Unit 731."

"Do we keep the data? Or toss it because we acquired it in a really f**ked up way?"

TheRockObama

"They have been instrumental..."

"One of the necessary evils through history has to be the experimentation on animals, specifically mice. They have been instrumental in our understanding of diseases."

Killdozah

To which this person replied:

"There's a pretty cool statue in Russia, honoring lab mice."

Zombiehacker595

"There's a school of thought..."

"Possibly the Agricultural Revolution."

"There's a school of thought that argues that it led to a diminished diet and poorer health for everyone, greater social inequality between classes and gender, and greater instances of warfare between and within sedentary and nomadic societies. So life really sucked for countless generations of humans for thousands of years."

"And yet it created the conditions for a population boom and the division of labour needed for humans to get really, really good at more specialized trades, skills, and learning, and here we are."

SodarnHinsane

To which this person replied:

"I feel like all you really need to do to negate the negative effects of modern society etc. is restructure cities to allow more natural things around us."

accomplishedpilot2

"All the people..."

"All the people that died trying berries, mushrooms, and other foods to see if they were poisonous. Somebody had to do it."

OneTyler2Many

To which this person replied:

"It truly sucked to be them."

[deleted]

"World War II..."

"World War II is controversial but it was the main factor why there has never been a major war since."

Starlight3020

To which this person replied:

"That and more importantly nuclear weapons. Even if Hiroshima and Nagasaki weren’t the main reason Japan surrendered, the fear of nuclear warfare has all but eliminated conflict between major powers in the 80+ years of relative peace."

YoungPacofgbm

"Starting a world war..."

"Starting a world war over the invasion of Poland. Sanctions against Libya. The killing of Osama bin Laden."

Rudaur

To which this person replied:

"Fair. Absolutely fair."

[deleted]

"Most wars..."

"Most wars lead to technological and medical advancements that likely never would have occurred without war."

llcuff80

To which this person replied:

"There is a concept called opportunity cost in economics. In a world of limited resources, it means that resources invested in one thing are resources not invested in something else. Whatever you do, there's always a tradeoff."

"War doesn't cause technological advancements to occur, it just directs those advancements towards certain goals."

Ellakastekat

"Dinosaurs..."

"Dinosaurs had to go for mammals to rise up as the dominant order on Earth."

Drakisright

To which this person replied:

"Earth would have been better if the dinosaurs continued being the dominant species."

CyclonsInaPoliceBox

"It broke the back..."

"Sherman's March. It broke the back of the Confederacy. Scorched Earth but at quite the cost."

Krd167

To which this person replied:

"In his own words: 'War is cruelty. There is no use trying to reform it. The crueler it is, the sooner it will be over.'"

Whiteshark49

The world is not black and white. It exists, in fact, in certain shades of gray. Something to think about as we continue to reap the benefits of modern-day living.

Have some observations of your own? Feel free to tell us more in the comments below!

Want to "know" more?

Sign up for the Knowable newsletter here.

Never miss another big, odd, funny, or heartbreaking moment again.

More from Trending/best-of-reddit

Eric Dane; Eric Dane and Alyssa Milano
Marvin Joseph/The Washington Post via Getty Images; @milano_alyssa/Instagram

Alyssa Milano Pens Touching Tribute To Honor 'Charmed' Co-Star Eric Dane After His Passing

Actor Eric Dane passed away on Thursday, February 19, 2026, after a battle with Amyotrophic Lateral Sclerosis (ALS). He was 53 years old.

Dane shared his diagnosis in April 2025 after a diagnosis in 2024.

Keep ReadingShow less
Screenshot of Seth Meyers; Donald Trump
Late Night with Seth Meyers/YouTube; Kevin Dietsch/Getty Images

Old Seth Meyers Joke Resurfaces After Trump Announces He'll Release Government Files About Aliens

The liberal outlet Meidas Touch resurfaced late-night host Seth Meyers' joke predicting that President Donald Trump would pivot to talking about the existence of aliens to distract from his role in the Epstein files.

Trump has done everything he can to dismiss or downplay the outrage surrounding the documents, which are said to contain detailed lists of some of his former friend and associate Jeffrey Epstein's most high-profile clients and enablers. The late disgraced financier was a convicted pedophile and sex trafficker.

Keep ReadingShow less
Donald Trump
Chen Mengtong/China News Service/VCG via Getty Images

Donald Trump Says 'Stupid People' Rate 'Make America Great Again' The 'Number One' Political Phrase

President Donald Trump was widely mocked after he declared that "stupid people" would rate his "Make America Great Again" slogan "the number one phrase in the history of politics in America."

Trump made the remark during a press conference while pledging that "together we're going to 'Make America Great Again'—though he didn't have great things to say for the slogan he claims to have come up with.

Keep ReadingShow less
Lauren Utter; Tyra Banks
@gutterutterart/Instagram; Darren Gerrish/Franca Fund/Getty Images

Former 'Top Model' Contestant Shocks Fans By Revealing Contract Clause In Event She Was 'Killed' On The Show

The tea about America's Next Top Model just keeps spilling, and apparently, there's a lot of tea.

With the launch of the Netflix docuseries Reality Check: Inside America's Next Top Model, more people who were involved have started coming forward to share their experiences from the show, including Cycle 10's Lauren Utter.

Keep ReadingShow less
Danika Mason
@news.com.au/TikTok

Australian Olympics Reporter Issues Blunt Apology After Appearing Drunk On Live TV—And That Is How You Do It

Australian sports reporter Danika Mason has apologized for apparently having a bit TOO much fun at the Milano Cortina Winter Olympics this week.

On February 17, Mason did her live report from the Games for Australia's Channel 9 while obviously hammered. Three sheets to the wind. Schnockered!

Keep ReadingShow less