do you see what you did? you said the constitution states 'its an inalienable right" so a written constitution is not necessary
however , the written constitution is the first time in history that this 'inalienable' right was thought up and written down as the basis being formed. where do you think this inalienable right would have existed , if not written in the constitution.
It’s “unalienable” first off, and second off, the US constitution was not the first time in history that life liberty and the pursuit of happiness was thought up and written down. What grade did you get in high school US history man?