Are you blaming the exorbitant cost of prestigious private education in the US, the crippling student debt system, and the unequal access to social advancement opportunity, on employers being unable to test prospective employees' IQ?

For a more complete explanation of the theory, see Half Sigma here (warning: post is more racist and sarcastic than I would personally endorse) and Bryan Caplan's response here.

Smarties and stupids hate each other because smarties blurt out inconvenient truths? "When a true genius appears in the world, you may know him by this sign, that the dunces are all in confederacy against him.", huh, Ignatius?

Not sure what you're saying here, but it seems sufficiently sarcastic that I should reply.

Suppose scientific racism is true. Presumably, smart people will figure this out. Some will have the social skills to stay quiet about it. What do you expect to happen to the rest of them?

Please source this. Give me the whole story.

I will signal the overabundance of sources I could use for this fact by limiting myself to only ones with "Times" in the title. Here's New York Times, here's The Times of Higher Education, and here's the Los Angeles Times which adds the fact, previously unknown to me, that bomb squads had to open his mail.

So Jensen was disproving scientific racism?

Sorry, typo. He found support for some aspects of it, nonsupport for other aspects of it, but was generally classified as a supporter.

Iodine deficicency makes you stupid, among other horrible things, but I'd like a surce for excess iodine making you smarter.

I wasn't claiming that excess iodine makes you smarter, just that deficiency makes you stupider (and so relieving that deficiency can raise IQ several points)

Now you completely lost me. What crime wave? Also, are you telling me intelligence prevents rather than enables crime? What kinds of crime?

The crime wave where probably all kinds of crime increased five to ten times from 1880 to 1980. Both More Right and Slate Star Codex have blogged about this recently. Low IQ is indeed a strong risk factor for crime.

How is atheism a matter of IQ?

It isn't directly, but I expect that just as Less Wrong has an average IQ of 138, so most atheist groups will select from people with IQs at least a standard deviation above average.

Well, in my experience race seems to be a vague and unreliable concept, mostly a tool of privileged groups to keep themselves apart from the rest (the asymmetrical One Drop Laws left me frankly aghast). Of course, if it is actually a useful heuristic in helping people, then by all means it should be used for that in the relevant context.

Race is, like all categories, a set of artificial discontinuous labels being forced upon natural continuous variation. On the other hand, the same sort of lossy-but-nonuseless generalizing ability that allows me to say "Black people are more likely to have so-called 'nappy' hair than white people" allows scientific racists to say "black people are more likely to have certain mental characteristics than white people". We could certainly improve accuracy further from there by better subdividing groups ("black people" becomes "Bantu", "San", et cetera; "white people" becomes "Scandinavian", "Mediterranean", etc) but we will lose accuracy by refusing to even make that first subdivision at all.