Who or what compiled /usr/share/dict/words?

Wikipedia says it's part of the wishlist Wordlist or Words package > On Debian and Ubuntu, the words file is provided by the wordlist package, or its provider packages wbritish, wamerican, etc. On Fedora and Arch, the words file is provided by the words package. [Wiki](https://en.wikipedia.org/wiki/Words_(Unix)) But from where is this compiled? I've been using it to 'help' solve crosswords at work, but there's a lot of words it is missing, and a lot that I don't recognise. What are the origins of this file?