A world without punctuation would make writing absolutely terrible because every writing piece would just be one big run on sentence. A writer wouldn't be able to finish expressing ones thoughts with a period before starting another thought. Books and writing pieces would make no sense because there would be no official ending or closure to a story. There would be no such thing as a sentence or phrase or even fragment because nothing would end. Also, there would be a lot of conjunctions in every writing piece which would make it incredible boring and uninteresting to read and write. You would not be able to make a point you wanted and it wouldn't let writers really put their point or theme out into the world.