> I understood recently about US is that the speech is protected between the citizen and the government, not between civil entities, as business/corps and citiz

> I understood recently about US is that the speech is protected between the citizen and the government, not between civil entities, as business/corps and citizen It depends. For example the 1st amendment protects a great deal of speech that in other countries would be slander, even though in that case the plaintiff is another civil entity and not the government.