Universities are bastions of free expression  Historically, universities have been centres of free speech and expression. The idea of tenure for professors was developed to ensure academic freedom both for teachers and students. [1] Censorship of any type of expression is a direct assault on the principles of a university. As Oliver Wendell Holmes commented, "The very aim and end of our institutions is just this: that we may think what we like and say what we think." Free speech on campus is responsible for producing, or at least fostering many of the progressive ideas of the 20th century even though these ideas were threatening and caused emotion distress to many people.  [1] American Association of University Professors (AAUP), ‘1940 Statement of Principles on Academic Freedom and Tenure’, 1940,