Sounds too conspirational, many scientists are just scientists. The method is open, the data is open, the inferences logically made. To say it is "mostly a leftist invention" is to appear to deny actual science. I doubt this is the intent, but that's how I see it. Why this preconception? Why this value ascribed to intelligence? I don't understand. What would a society gain out of deprecating the less intelligent? Surely what you should do is to allow them to rise to their place? That would require establishing that hierarchy first, rather than just putting people down. The goal cannot simply be "have more intelligent men, the rest is magic!", but an ordered society at every level.
At some level this seems selfish to me. I may have a passable intellect, but it serves its purpose and that's it. I am inferior to a whole host of "dumber" people. I.Q. cannot be a bar, it does not show the worth of an individual. If I believe intelligence to be mostly contributory to worth (as I consider myself intelligent), then that is selfish. The informative posts are great though, disagreement notwithstanding.