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.
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!
Please spell it as hiccup. The spelling hiccough gives me a headache.
Never!
imma try this and if it didnot work ill come back here.
It’s never failed me since I learned about it fifteen or so years ago.
Another one is a small spoonful of peanut butter. 🤷♀️
This can’t be true, as the real method is to plug your nose, look at the ceiling and drink out of the left side of a cup.