202

Assuming that it's purely random, let's consider where these people would probably be. Taking the percentage of the population each country represents, we get: China: 18.2% = 6.37 people India: 17.5% = 6.125 people America: 4.29% = 1.5 people Indonesia: 3.43% = 1.2 people Pakistan: 2.78% = 0.93 people ...etc. The percentage keeps going down. This means ...


185

It's HF radio, or nothing The odds of anyone meeting again are almost exactly equal to the odds of at least two being either radio hams, or able to learn the skills from books. The population density of 35 people worldwide is so extremely low that the odds of finding someone without the benefit of global communications is practically zero. Strategies like ...


156

My first thought is redundancy. You shouldn't send just one copy of the message, you should send thousands and through different methods. Some thoughts on possible methods: Rock carving in a protective sheath (e.g. amber or a similar substance). Shoot rockets to the Moon and Mars (vacuum doesn't decay things the way that atmospheres do). Build satellites ...


145

"You know", Sog-Yogthot (no relations) said to I'g-m'ell over by the Shoggothnut table at the committee meeting for the betterment of the human realm. "The humans world is really dry, how can they breathe? I'm going to send them water. Does forty days and nights of rain sound roughly enough?" "Dunno", said I'g-m'ell (who was more of a creature of eternal ...


143

There's a very specific existing case study of nearly this exact question. In the 1970s, the US Department of Energy began investigating what is now known as the Waste Isolation Pilot Plant as a means of safely storing radioactive waste for the next 10,000 years. Considerable thought was put into the topic of signage: how to indicate to future ...


120

Your magical mirrors could replace 28,000 kilometres (17,400 miles) of Optical Fibres. The total costs of the cables currently laid is estimated to be about 1.1 billion (Source below article). https://en.wikipedia.org/wiki/Fiber-Optic_Link_Around_the_Globe In simple terms, the communications happen by having an array of high-speed LED placed across the ...


118

By computer Clearly, humans can't handle direct contact with Jimmy, so what's needed is a layer of separation. Fortunately, humans have recently invented a way for two beings to have a form of interaction while being nowhere near each other. All Jimmy needs is a remote cabin in the woods, a laptop, and a satellite dish. Now, putting Jimmy online is ...


113

They don't actually need names. Names aren't used that often in everyday communication. Body language is very effective for indicating which person in a group you're talking to. And to get somebody's attention, simply call out "brother!" in their direction, and look at the person you're referring to. The only other situations where you use names are when ...


111

It's a lot more complicated than it sounds. Not just for the fact that the language changed considerably over time, but because it is highly dependent on in which circles you commune. The higher the educational background, the less trouble someone from 'modern day educated London' would have understanding early modern English (what we know as 'Shakespearean ...


111

Polish them to a mirror shine. Put one spoon with one operator on a tower within visible distance from another one. Invent coding that uses "long shines"-"short ones". Important messages would still be sent by horse (because it's harder to stop a messenger on a fast horse) and frivolities can be sexted with Morse code. EDIT The use of a horse is to ...


110

Inspired by Hosch250's comment 1- Carrier pigeons don't actually go to a any given location, they really just return to their nest. 2- Spoons have an annoying tendency to fall into soup bowls. Take advantage of these two facts. Your pigeons are spoons on the outside but they're still pigeons on the inside, only very confused. Get another alchemist (surely ...


96

If your group renounces their personal identity in favor of their work, the obvious thing to call them by is profession. If a particular brother is responsible for the monastery gardens, he's Brother Gardner. If he's responsible for their walls, he's Brother Mason. If he's responsible for their horseshoes and swords, he's Brother Smith. You'll note that ...


92

Let's consider a real historical example Let's fix the historical period to the 14th century, and let's say that "language 1" is French and "language 2" is Romanian. Both French and Romanian are descended from Latin (which is thus "language 0"), and in the 14th century, they had had no contact for about 1000 years. No 14th century Frenchman spoke Romanian, ...


89

The distributed nature of the internet makes it really impossible to destroy all of it, and all the information on it, without destroying every computer as well, which you seem to be excluding. To erase all access everywhere you must contact every computer on the internet. In particular I need to ask what you define as 'the internet'. You have a rough ...


82

I think we can all agree that whoever finds this message in 50,000 years isn't going to speak English. Or Mandarin. Or Hindi, French, Spanish, Swahili, or, in fact, any language spoken today. So we'll have to figure out a way to communicate with them in a language that we'll both understand. I'd look to communication with aliens for inspiration. There have ...


77

Middle management If you are driving a car, you don't go straight from first gear to seventh. You have to shift up gradually, picking up speed. Let's take an individual Starmaker, the size of a nebula. "Within" him are many, many "short-lived" star clusters. The Starmaker engineers a being whose speed of thought is slightly faster than its own - think of ...


73

The military and organizations that need absolutely secure data transmission, like government agencies and banks, would love your mirrors. The downside is that these will require some proof that your connection is indeed absolutely secure, so there will be research involved. The biggest group that could profit from such mirrors are researchers. Imagine how ...


70

He could try playing with a young kid. Children, because they have not experienced as much as adults, often lack the same level of understanding of events that adults have. So they are much less likely to go mad and die simply because they don't really understand that this is an eldritch abomination. I've also found that young children tend to enjoy playing,...


70

The simplest solution is that in both population you have some rare few scholars who speak language 0 and can communicate in this language, even though they do not actually speak each others' modern day language 1 or 2. This is basically how political and scientific discourse was kept alive in the middle ages in most parts of Europe where Latin became the ...


69

It is not possible, because the Internet is not a thing - it is a relationship. For example, imagine 20 people in a book club. The book club is not a thing that can be pointed at, it is the relationship between the 20 people all talking to each other about the books they have read. How would you "destroy the book club"? Well, you could stop all the people ...


64

The key to peaceful communication lies in Creeping Normality. Jimmy likely has plenty of time to work on establishing the connection, as most Eldritch Abominations are quite long-lived, if not immortal. Jimmy needs to make contact gradually, over generations. Choose a family that seems to be pretty hardy and with a bit of natural insanity, and make some ...


62

Radio Waves Are Hard To See, And We Didn't Think To Look At Them There are about 134,000 stars within 200 light years of Earth. That's a lot of stars. We can't look at even a significant fraction of all of them closely enough to detect the equivalent of human-made radio waves. A 200 ly radius is a sphere 33,493,333 ly3 in volume. The stellar density near ...


61

It is impossible for the ship to travel at the speed of light, it can at best travel close to the speed of light. The difference matters. There is nothing really stopping two ships travelling at a speed arbitrarily close to c from communicating with lasers or radio. It will take the laser the same time to travel the distance as it would if you travelled at ...


61

I know you are expecting a distance answer but I'll give a time answer. A good rule of thumb is a maximum of one to three months of travel. There are exceptions, but most civilizations that have direct contact are no more than one to three months away from each other. The distance varies with the terrain and type of travel. Most of the time when ...


61

It will be a crime for civil servants to misrepresent or present false information with the deliberate intention of deceiving fellow government officials or members of the public while acting out their functions as government representatives. This works just fine. Jokes and sarcasm are temporary. The government worker moves on and then tells the ...


60

As has been explained in another answer, the eldrich horrors do seem to realize that they have a negative effect on humans, and they want to benefit humans. The logical thing to do then, is identify what other things also have a negative effect on humans, and then systematically expose themselves to these other things. Since they seem to believe that ...


59

Get another alchemist, convince him to use Sympathetic Magic to bind pairs of spoons together so that what happens to one happens to the other. They're already identical and infused with magic from the transmutation, so this should be technically easy to accomplish. Now construct a pair of Ouija style code-boards covered in words and letters and place the ...


59

In all likelihood, there is no forcing one society to adopt the other's system, instead, people would likely adopt a local market approach to measurements. Let's say you are on Earth building spaceship parts that will be used to make ships on Farawaynos, you manufacture to the other society's system of measurements. If they want to sell parts to Earth, ...


58

When the English began settling in Australia they were at late 18th or early 19th century level whereas the Australian aborigines didn't even have Stone Age technology. A difference of some tens of millennia. (As a commenter observes, not all Australian aborigine tribes had lost stone age technology; some did use stone tools.) When Cortés arrived in Mexico ...


58

Crows. If you don't have pigeons anymore, your other simple option is to use crows. They are very intelligent, great memory, longer life span, stronger etc ... Some would argue to use ravens because they are stronger, but they are less sociable and less comfortable around humans. But you can train them anyway.


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