Asklemmy

Does it count if I have been keeping a copy of all the Kiwix releases and could submit those documents? It would certainly be one hell of a kickstart.

Otherwise, screw civilization... Here's how you build and tune a trebuchet (yeah I have a bit of experience with the construction, as long as someone else supplies the rope).

What is and how to fight for Democracy.

I'm not sure there is anything I could contribute that someone else couldn't. Probably basic germ theory?

Combination of food safety and basic food recipes/methods of cooking for every biome.

My contribution is a very practical tip for parents: When you need to carry a kid sitting on your shoulders, first pick them up and have them sit with both legs on your right shoulder. Then, with your right hand, grab the kid's right leg, and with your left hand grab the kid's left leg and lift it over your head to place it in your left shoulder. Mirror the maneuver if necessary. The result is a quick lift-sit-and-switch technique, and fewers kicks to the head.

Never trust someone who says one thing but tries to do another, or who's inconsistent on something while saying they're not.

Can't go wrong with the Old Testament, amirite guise?

Some basic concepts of medication - clean wounds (preferably with alcohol, because it kills germs), understand how germs spread, and know the basic ideas behind vaccines. If society had known these things 1000 years ago, it would've saved billions of lives.

I would explain how to replenish the world. "Bad news everyone, sex causes children...".

Explain the concept of a train and tram.

As many works and studies about morality and ethics as possible, because god knows we threw those out the window long ago, and it's biting our asses now. I'd also add an emphasis on John Rawls' works, particularly "Justice as Fairness: Political not Metaphysical" and "A Theory of Justice".

How to get rid of hiccoughs. No one knows this trick! All you need to do is hold the flaps of your ears closed and drink a little water. It works every time!

How to make fire

It's hard to choose "one piece" of knowledge, so I would try to persuade whoever is writing the book to include the time traveler's cheat sheet. https://i.imgur.com/O6vSrvq.jpg

I didn't make it, but includes a lot of information that didn't have an intuitive path to discovery, but a lot of practical benefits for humanity. If I were to add to it I would try to include at least descriptions of a few other things:

• batteries
• engines
• simple computers (although this may be more involved than the earlier parts combined, so perhaps just simple logic gate diagrams)
• genes
• a guttenberg press
• lenscrafting
• a world map
• calculus
• special and general relativity (also complicated certainly, but could be useful later)
• and basically as many physics equations as I can think of

I’d put the National Electrical Code out there. It doesn’t tell you how to do everything with electricity, like generating it, but it does give a lot of details of how to wire things safely.

Paper making and double entry accounting