This is based on How do I prevent a character from being resurrected?
One of the answers was that a good way to keep them dead is to threaten a loved one, but then the comments pointed out that you could simply Raise the loved one as well.
This made me think that I'm sure it's written down somewhere that returning from the dead is a huge ordeal and that the vast majority of people simply aren't interested because the afterlife is pretty rad and they don't have anything they desperately want to do on the Material Plane.
And as such, Raise Dead and the like would only work on people who are highly motivated about something they need to do in their life, and everyone else will simply refuse.
This was added specifically so that you couldn't bypass entire adventures by simply ressurrecting whatever dead NPC triggered the start of it and as an explanation for why dead kings weren´t simply brought back to life when they were assassinated or succumbed to disease or whatever.
But I can't for the life of me remember where I read this. I'm quite sure it's in one of the official D&D books, I think it was 3.5e, but I don't know which one.
Does anyone remember a rule or a block of info in any of the books saying anything about who is or is not willing to be brought back from the dead?