:::::::::::::Also, the idea that there are "two definitions" doesn't match what the sources say; at least going by our sources, all of the mainstream academics and historians who have gone into the term at any significant length have described the core belief here  the idea that "multiculturalism and political correctness are products of critical theory, which originated with the Frankfurt School"  as a conspiracy theory.  Obviously people buy into it to varying degrees, and few people would call their own beliefs a conspiracy theory; but we have to go with the most reliable sources, and I think in this case they're pretty clear.  Essentially all mainstream scholarship on the subject says that the way the term is currently used among conservatives is focused on the conspiracy theory invented by Lind, Buchanan, Weyrich, and the like; the only coverage that I've seen so far that argues otherwise comes from a fairly WP:FRINGE perspective or from opinion-pieces, which we can't weight equal to eg. Jérôme,      Richardson, Beirich, and so on.  Jérôme's Cultural Marxism and the Radical Right in particular traces the use of the term extensively throughout the political world, detailing connections, how various commentators influenced each other, and so on; it concludes with a discussion of how the fundamental concept is a conspiracy theory that right-wing ideologues of all stripes have repeatedly repackaged in various forms.