* Vowels are fundamental to human speech: The sounds we make with our vocal cords are the basis of language. Vowels are some of the simplest sounds, representing the basic building blocks of language.
* Languages evolve: The development of writing systems and alphabets is a long, gradual process. Over centuries, different cultures and languages developed their own ways of representing sounds, including vowels.
* No single "inventor": While specific individuals might have made important contributions to the development of writing, it's unlikely anyone single-handedly "invented" vowels.
Instead of thinking about an "inventor," it's more accurate to consider the evolution of human language and the development of writing systems as a collective effort across cultures and time.