It's enshrined in you and me. :) Law is not the only mechanism for upholding cultural values and norms. One important distinction is that free expression is no

It's enshrined in you and me. :) Law is not the only mechanism for upholding cultural values and norms. One important distinction is that free expression is not limited to the "right to say anything"; it also includes the right to listen to the expression of others. See, for example, the rich history of librarians resisting turning over records of who reads what books, which could result in a chilling effect where people are scared to read controversial material.