[Image: German Students and SA members burning books and papers from the Hirschfeld Institute, which studied human sexuality and promoted tolerance towards homosexuals and transgender persons, 1933.]
We often think of intellectual freedom in terms of media censorship, but threats to our intellectual freedoms are much more pervasive and, often, much more subtle. Even a single instance of censorship can have tremendous repercussions: for instance, the burning of the Hirschfeld Institute's library and research documents, famously pictured above, set back science regarding human sexuality and gender for decades.
