History professor Harry S. Crowe was unjustly fired in 1958 from his tenured teaching position at United College over a private letter he sent to a colleague criticizing the College administration and expressing concern about a Conservative victory in the upcoming federal election. The controversy over his dismissal gained international attention and led the then fledgling Canadian Association of University Teachers (CAUT) to conduct its first investigation into tenure and academic freedom. This celebrated case helped establish the CAUT and is often pointed to as a defining moment for academic freedom in Canada. You can read the text of Crowe’s letter here.