A website I recall from the early 2000s.
IIRC, it was originally a Flash app. I am honestly shocked the domain is still paid up; was expecting to have to dig on archive.org for a ghost version. But it is updated at least as of 2022! And still has the really good interface I remember. Lets you create maps like this (pretty much random fpr demo):
https://theyrule.net/about has background including how it updates from WikiData and this insane spreasheet.
The #1 resource listed is The Communist Manifesto
Sadly, I do not find Brian Thomspon here.
I'd never heard of this, thank you for posting