The United States acknowledge the right to privacy as a basic, inalienable human right. Tor ensures that it is as difficult as possible for the US (or any other) government to violate that law.
Live free or die is the state motto, after all.
Source: Sanity and Privacy Win Out in the Library-Tor Kerfuffle | WIRED
DAMN THE MAN! Keep Tor running!
A library in a small New Hampshire town started to help Internet users around the world surf anonymously using Tor. Until the Department of Homeland Security raised a red flag.
Source: First Library to Support Tor Anonymous Internet Browsing Effort Stops After DHS Email – ProPublica
The dark web actually has promise. In essence, it’s the World Wide Web as it was originally envisioned.
Source: The Dark Web as You Know It Is a Myth | WIRED