Section 230 of the U.S. Communications Decency Act (CDA) of 1996 says, “No provider or user of an interactive computer service shall be treated as the publisher or speaker of any information provided by another information content provider.”
A group of 153 academics, writers, and social activists published a letter in Harper’s Magazine (7 July 2020) expressing concern that “a new set of moral attitudes and political commitments” are tending “to weaken norms of open debate and toleration of differences in favor of ideological conformity”.