Historically speaking, free speech has primarily served as a shield against oppression. Jacob Mchangama, who has written Free Speech: A History from Socrates to Social Media, also wrote an article at the Heterodox Academy blog. Here is an excerpt that I will have ready the next time I hear the free speech is a "problem" or that it is a tool of "oppression" or "violence."

A global look at the history of free speech suggests that free speech is in fact a shield against oppression. White supremacy, whether in the shape of American slavery and segregation, British colonialism, or South African apartheid, relied heavily on censorship and repression. Conversely, advocates of human equality like Frederick Douglass, Ida B. Wells, Mahatma Gandhi, Martin Luther King, and Nelson Mandela all championed the principle and practice of free speech to great effect and at huge personal cost. In the words of the late Congressman John Lewis, “Without freedom of speech and the right to dissent, the civil rights movement would have been a bird without wings.” Tragically, several countries, not least India, still use hate speech laws, with roots stretching back to the era of British colonialism, to silence dissenters as well as the minorities these laws were supposed to protect. Moreover, the current tsunami of Republican-sponsored bills aimed at censoring “divisive” teachings on issues such as race, gender, sexual orientation, and even American history, are often uncomfortably close to their anti-racist speech code counterparts when it comes to wording and the underlying philosophy that words constitute, or are comparable with, tangible physical harms. Far from serving as a remedy against “cancel culture,” such bills are likely to increase partisan and ideological policing of nonconformist speech to the detriment of free and open discourse without which higher education becomes stale and ultimately meaningless.