What would your contribution be for a book put together to restart a a civilization?
The title is a bit over dramatic but, per the title, if you could contribute with one piece of knowledge to a book that every single individual should learn from in order to kickstart a civilization, what would be yours?
My personal choice would be the process of soap making, from scratch.
I wonder if a book along these lines already exists. The nearest I can think of is The Art of Manliness website.
I would probably buy a book that covered a lot of the basic skills needed for a society if it were done well. I want to try a lot of those things like smelting, house construction, metalworking, etc. I'm sure books exist for each of these but I doubt one book tries to give overviews of all.
Also an interesting question: What ARE the skills needed for a civilization? Start from skills needed when dropped off alone in the wilderness and work your way up to "needing" bureuacrats.