The emergence of writing was due to the emergence of pictography (pictures that conveyed messages) and hieroglyphic writing, in which a separate sign was first a word-image, then a word-symbol, then signs appeared corresponding to individual syllables. Then the first alphabet was created, in which one sound corresponded to each character.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.