Asklemmy

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.

I would write an overview of extended mind theory, an introduction to human cumulative culture, knowledge engineering and TRIZ.

The history of human civilization is riddled with challenging problems, solving which takes more than multiple human lifespans worth of effort. Having a good learning resource about the most advanced methods and tools for navigating these problems would be a huge help, I think.

Paper making and double entry accounting

I'd explain LGBTQIA issues, personal and community acceptance of those born different.

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

Is there a book called "Living off the Land for Dummies"?

A constructed language, or method of language, that balances minimalism with maximum effectiveness.

Explain the concept of a train and tram.

The imperial system of units

The bible.

I want to watch the world burn again. Humanity doesn't deserve a second chance.