this post was submitted on 10 Oct 2025
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Time travel to Earth's past would be cool to study history. But how to not accidentally ruin our timeline?
I think the real progress is to be made in space. Send a probe to a solar system 50 LY away but back in time to arrive the same day you sent it. It can travel really slow too, because time isn't a concern.
If there is a habitable planet, send settlers there at the earliest time in history possible. Settlers can be robots that just build infrastructure and plant stuff for 10k years. Then go yourself.
Time travel is exclusively a cis white guy fantasy: https://www.youtube.com/watch?v=H-WHAISI02w (Anyone else would be shunned and probably killed as some sort of witch/demon.)
This is kinda funny. It's like "Jesus was a white guy" mixed with "cis whites need to check their privilege"
The idea that you could go back in time as a nutritionally giant white guy speaking gibberish and fit in because white is a bit anti history.
If we're sending people back in time it's going to be Dwayne Johnson.
What about wanting to fast forward right past the stupid ages?
Y'all don't give yourselves near enough credit for what sounds "common sense" to you.
It would look more like this.
(Click image if resolution too low)
The reaction in that picture is also bang-on though, because Semmelweis got a huge amount of pushback from the medical community at the time, who took offense at the apparent accusation that they were so dirty they were killing their own patients.
Just about everyone will be successful at some things.
Everyone knows how to make:
- Fire
- Lever
- Wheel
- Clay blocks
- Penicillium molds (antibiotics!)
- Wine
- Flatbread
- Can work out a very basic steam turbine (pot+wheel)
Quite a few also know how to make:
- Bellows and basic forgery tools
- Various simple fabrics
- Simple water pumps
- Simple carts, bicycles
- Galvanic cells, or maybe even alternating current sources (+wheel=hydro/steam power!), incandescent light bulbs
- Cheese and regular bread
- Beer, cider, moonshine
- Soap
You can also teach them the basics of proper hygienic procedures to keep their food safe, their hands free of pathogens, etc.
Oh man, have you met an everyone? I might be pessimistic, but I think you might be overestimating by quite a bit. A lot of people know how those things work, but knowing enough to replicate even basics feels kinda rare. Even fire, most don't know beyond 'rub two sticks together'.
However, if you end up in a Christian land, you'll be seen as a heretic or sorcerer and burned at the stake before you get the chance to try any of these.
Not if you're a priest. This is the caveat plenty of people used to move science through the roughest of times.
I feel like unless you can make everything yourself, logistics would be a problem:
-Bring me Potassium Nitrate
- He is speaking in tongues, kill him!
I think showing just a few simple tricks that you can do yourself would advance you quite high in ancient academia, and then you'll have some patient helping hands.
I could make an electric generator/motor but I couldn't tell you how it works beyond "you spin copper around a magnet and magic happens." 🤷♂️
I'm pretty sure there was research done that showed that people who are hypothetically transported back in time, won't be able to make any meaningful contributions to the era they go to. They will just end up integrating in that the society of that era.
Basically if you go back in time to medieval Europe, you could introduce something like paperclips to society, but you won't be able to introduce things like computers even if you know how they work and how to use them.
For a really easy demonstration of why, look at videos of WW2 era production machinery.
They are often amazingly, fascinatingly complex masterpieces of engineering that are still the result of generations of combined mechanical effort and discovery, and what we have now is as far above them as they are above a printing press. And building them required complex tools built by other, slightly less complex tools, you're not going right from anvil and hammer to a T-model production line.
You might be able to start the scientific revolution early and introduce key concepts but you do not know how to build even a 19th century cannery, much less a computer, and the team of engineers it would take to do it doesn't exist either.
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