Sorry, Roissy, but you're wrong.
Correlation does not imply causation. Just because all prosperous societies have collapsed, does not mean that prosperity induces collapse. Do impoverished societies collapse? Uh, yeah. Thank you, Mario, but our princess is in another castle.
Unless, of course, he is using prosperity to mean something else. In which case he needs to get his head out of his ass, because that's not what that word means.