The comedy of errors that resulted in World War 1 seems to indicate that there is a group of time travelers trying to make sure this time line happens.
I would go back in time and meet the people who wrote the first ever USB standard. Then I would convince them that all USB connectors have to be reversible from day one so that nobody will ever need to struggle with the 20/80 odds of getting it right on the first try. Come on, it’s two possibilities and the probability of the wrong one is at least 80%. What’s the deal with a connector like that?
Accordingly to the USB inventor, he didn't make it reversible right off the bat because it would need 2x more wires, circuits, and cost 2x more. So you probably [won't be | weren't]* able to convince him.
Perhaps a better approach is to tell him that they should be clearly asymmetric, to both touch and sight. Like HDMI connectors are.
You can even make the connector look like a B with a larger loop on one side, that when people were like why is it shaped like that you could just say that's the b in the USB
You don't need double the wires if you change the recepticle so that you can plug it in both ways, and the recepticle would just have those wires connected on the board.
One of the major problems encountered in time travel is not that of becoming your own father or mother. There is no problem in becoming your own father or mother that a broad-minded and well-adjusted family can't cope with. There is no problem with changing the course of history—the course of history does not change because it all fits together like a jigsaw. All the important changes have happened before the things they were supposed to change and it all sorts itself out in the end.
The major problem is simply one of grammar, and the main work to consult in this matter is Dr. Dan Streetmentioner's Time Traveler's Handbook of 1001 Tense Formations. It will tell you, for instance, how to describe something that was about to happen to you in the past before you avoided it by time-jumping forward two days in order to avoid it. The event will be descibed differently according to whether you are talking about it from the standpoint of your own natural time, from a time in the further future, or a time in the further past and is futher complicated by the possibility of conducting conversations while you are actually traveling from one time to another with the intention of becoming your own mother or father.
Most readers get as far as the Future Semiconditionally Modified Subinverted Plagal Past Subjunctive Intentional before giving up; and in fact in later aditions of the book all pages beyond this point have been left blank to save on printing costs.
The Hitchhiker's Guide to the Galaxy skips lightly over this tangle of academic abstraction, pausing only to note that the term "Future Perfect" has been abandoned since it was discovered not to be.
Go back to 1911 and convince Taft to concede the Republican nomination to Roosevelt. That allows Roosevelt to stomp Wilson, get the US into the war before Russia left, and get the war over with years earlier.
This prevents both Stalin and Hitler from rising to power, and prevents most of the European theater of WW2, as well as a host of other knock-on effects.
In this scenario Lenin does not manage to take over Russia and the warning to the world by the real life examples of Germany and Italy about the dangers of fashism does not happen either. Authoritarianism raises its ugly head later in a world with better weapons and more destructive potential for humanity.
I doubt it. The Russians are still gonna want to try to beat the US at anything they can, and prove themselves on the global stage, but it may have been a cooperative venture, instead of competitive.
I'd like to say something noble like warn Amelia Earhart, or hookup Adolph with some Bob Ross videos. But if I'm being honest, I would probably be selfish. I would tell past me to not fuck up quite a few things that past me royally fucked up.
Think of all the good I could do with a trillion dollars. I'd have to create a lot of destruction of other people's wealth to get there but they will understand. I really need a trillion dollars!
Got to do it in stages so it doesn't look too premeditated.
Start a online auction site where people can sell their stuff and you get a small cut of the profit.
Then to help people on board start a payment processor company to ensure that the sellers ship their goods and that buyers pay.
Once that has established, go public with it so that your stock sales can support the existence of your current portfolio while you dabble in other things that you know are very profitable.
Once you have that going, which will take a few years. You can take a victory lap or two and maybe pay some PR firms to make you look like the cool rich kid on the internet that everyone wants to hang out with.
Then you can do stuff like starting a spaceship company and helping to bring about the end of the internal combustion engine by starting an electric car company and doing some solar panel stuff.
Eventually you'll be the richest person on the planet and then you can get to doing the really fun stuff assuming you don't like tank all of your personal reputation by blowing 20% of your net worth on a microblogging website or something while disavowing your trans daughter.
I mean, if you're smart enough to do all the other things surely you wouldn't blow it at the five yard line like that.
Warn about how plastic (especially single-use) is a major pollutant, with microplastics managing to get into our organs with long term consequences we are yet to grasp.
It did push our technology and way of living forward, but at what cost?
That wouldn't work because you're a single person fighting against the same companies that finance climate change denialism. Hell, between understanding that leaded gasoline was harmful and banning it were at least 20 years
Yeah but the OP question isn't asking what you would do, but rather what you'd change.
If the question was about what people would do, half these answers have a lot of explaining to do.
I'd go back and write a book with just enough truths to cement myself as a soothsayer. I'd then warn of wars, eco disasters, pandemics, natural disasters. Then I'd invest some money in some good places and make sure it made it to my kids after I'm gone.
I would try to save the roman republic and prevent the roman kindgom. It would also be interesting to see what would have happend if they never switched to christianity.
To prevent the empire would be more complicated than it looks like, since you got multiple rebellions and civil wars popping up as early as 135 BCE. They ultimately boiled down to
plebeians and/or slaves pissed due to poor living conditions
local peoples rebelling against Roman oppression
some patrician family wanting a larger slice of the pie
And those are all problems that are damn hard to address without leading to plebeians being manipulated, local peoples being suppressed, and cutting down the power of the patricians by a central, strong government. That's basically what Caesar tried to do, and Octavian achieved.
I'd find the first motherfucker that started smoking stuff, whether it was first tobacco or whatever, and get rid of him/her before anyone else ever learned of the practice/habit.
Would have been better health for countless people afterwards, if simply nobody ever knew..
No, eliminate the single individual that originally invented tobacco smoking. Then nobody from that point on would ever know and the problem would have never existed in the first place.
Nip the problem directly at the source ya know. Guess you're not all that good with these sort of hypothetical time travel thoughts..
Smoking was discovered independently in many cultures with different substances used by different cultures. In the Americas, it was tobacco, while the Scythians of Central Asia used cannabis in ritualistic hotboxes, as evidenced by archaeological finds of smoking tools in kurgans. Other regions, like India and Southeast Asia, saw the smoking of opium and herbs.
I'd add the Spanish Inquisition to that agenda. But who knows, perhaps the Holocaust might not have ever happened if the Spanish Inquisition never happened. 🤷♂️
Time travel thoughts bring up all sorts of hypotheticals...
There are many ways to stop or deeply alter the Spanish Inquisition, like never getting christianity going, never getting islam going, ensuring the Arabs wipe out all the christian kingdoms of Andalusia, ensuring the Cordoba Caliphate doesn't disintegrate, doing something to both Isabella I of Castille and Ferdinand II of Aragon so they don't get into power.
I'd invent the printing press during the classical era and watch what happens from there. I guess the folks at Carthage would also enjoy knowing about paper making, better wind-powered sails for ships and to be on the lookout for those "Romanes"
I prefer to rewind time with me along, be young again, that kind of time travel. Of course with my knowledge and memories of up to before my "time travel", be retained. I could only remember what I could any way. The future would surely not happen exactly as the same before. Live a new younger life, a seemingly fresh restart at an early point in my life.
Bring back Sodium batteries and how to make them as well as solar panel production. Probably to Nikola Tesla.
To be a bit more precise whatever the easiest to produce versions of each are not the best ones so they could actually be produced at the tech level at the time.
I'm sure they would still end up creating equivalents of oil Barons etc. but at least it would be based on a cleaner tech and more able to improve from there.
Changes could have so many repercussions even well meaning actions could make things worse. The safer bet would be to collect lost books and art.
That said, stopping the Lincoln assassination is tempting. I'd hope to change reconstruction to better wipe out the confederacy, prevent lost cause doctrine, and better integrate former slaves into full citizenship and society.
Global temperatures are inevitably rising due to climate change. Scorching temperatures to become normalcy in the next years. Microplastics (due to pollution) everywhere, even inside our brains. More and more species becoming extinct, disrupting the food web. I could stop here, but I must continue: digital dystopias becoming true, like 247 surveillance and AIs everywhere (even though I like artificial intelligence to a certain point). Increasing prices worldwide, increasing professional competition while there's a grow of ghost/fake job vacancies. Political polarization and extremisms, rising of bigotry. Increasing homelessness while there's an increase of hostile architecture and growing rental prices. Sorry, but it doesn't seems like everyone is really having the right to live a healthy and happy life...
Well, I don't think anyone is really sure just how exactly time travel can mess with stuff. I would probably take a page from some time travel movie I saw. I would want to avoid any sort of temporal paradox and avoid too many changes.
So, I would probably remove myself from the equation as much as possible. Go to a hotel or somewhere where I can avoid accidentally running into anyone I might know. Leave all electronics behind, but take a book or something. Spend the whole day avoiding TV/News/People and just reading or work on perfecting a skill. At the end of the day I would call up a broker from the hotel room and find out which stock had the greatest percentage gain that day. Just enough information for one good trade.
Then I would go back to that morning, buy up a ton of that stock, live out life normally, then sell the stock at the end of the day.
Only later do you find out your uncle is actually your father because of a bizarre incident where your dad got his nuts punched by an unknown person never seen again
I would install an automated missile system on every single would be colonizer country's waters, that would sink their ships when they tried to leave port