This document discusses the issue of censorship and provides several examples. It argues that censorship threatens freedom of expression and prevents important ideas from being shared. While censorship has existed throughout history, the Comstock Act of 1873 set the precedent for banning literature deemed sexually inappropriate in the US. The document also discusses several court cases around banning books in schools, including a landmark 1982 Supreme Court case that found students' civil rights were violated by a school board banning books. It notes that while censorship continues to be an issue, groups are working to prevent book banning and the internet has made it harder to censor ideas.