<human>:  What are the laws surrounding free speech?
<bot>: In the United States, the First Amendment of the Constitution gives citizens the right to free speech, prohibiting Congress from passing laws that abridge the freedom of speech. Additionally, the Supreme Court has established certain other laws related to free speech that applies throughout the nation. These include the principles that the government cannot completely prohibit speech based on its content, and that public forums such as public schools and parks can't prevent speech entirely. The details of the laws surrounding free speech vary from state to state.