Sumerians built and invented a lot of stuff. You see, nobody had done anything yet, so there was a lot of catching up to do. So really it was more important than writing stuff is for us in a way. Plus selling stuff, history (aka yesterday), instructions, etc.
What did they even need to write down?
Trading, govt.stuff.
Notes for managing projections and debts
Sumerians built and invented a lot of stuff. You see, nobody had done anything yet, so there was a lot of catching up to do. So really it was more important than writing stuff is for us in a way. Plus selling stuff, history (aka yesterday), instructions, etc.