The Protocols isn't a "conspiracy theory"  it is a false document intended to support certain conspiracy theories which predated its own authoring. It is mentioned under false document, but of course should also be mentioned here. There are whole categories of antisemitic conspiracy theories which should be discussed in this article; however, when I was working out the "Subjects of conspiracy theory" section, I didn't have the stomach to address them. I still don't.

I would overall be more interested in this article as a discussion of the structure and function of conspiracy theories  what they mean to people, what broad categories they cover, and how they interact with mainstream history  than as another "List of" page. I hate "List of" pages. But that's probably just me.