Board Thread:Questions and Answers/@comment-104.172.189.120-20150505044206/@comment-25047329-20150505045644

In folklore that pertains to the real world there really doesn't seem to be much history behind ghouls. Unlike their "cousin" monsters, vampires, zombies, and the like, they just don't have a rich lore. I guess ghouls are just born that way.

In TG ghouls are also just born that way (not counting artificial ones). It hasn't been explained where they come from, but I kind of just assume that they're the natural predators of humans. There could be more behind it, like the idea that they were created has been those around by the fandom, but nothing is really known.