The question now is how to fill the void Jensen's death leaves, particularly for scholars open to scientific inquiry who challenge some of his conclu… - James Flynn

[Jensen] does not believe that [heritability] estimates alone can decide the issue of genetic versus environmental hypotheses. However, he argues that the probability of a genetic hypothesis will be much enhanced if, in addition to evidencing high [heritability], we find we can falsify literally every plausible environmental hypothesis one by one. He challenges social scientists who believe in an environmental explanation of the IQ gap between the races to bring their hypotheses forward. Given his competence and the present state of the social sciences, the result is something of a massacre.... Far too many of Jensen's critics have not taken up the challenge to refute him in any serious way, rather they have elected for various forms of escape, the most popular of which has been to seize on an argument put forward by the distinguished Harvard geneticist Richard C. Lewontin.

There are almost no courses on intelligence in Psychology departments in America. When I ask staff why, they give the same answer: what if a student raised a hand and said, what do you think about the race and IQ debate?

The collapse of the Ice Ages hypothesis does not, of course, settle the debate about whether there are racial differences in genes for intelligence. If universities had their way, the necessary research will never be done. They fund the most mundane research projects, but never seem to have funds to test for genetic differences between races. I tell US academics I can only assume that they believe that racial IQ differences have a genetic component, and fear what they might find. They never admit that the politics of race affects their research priorities. It is always just far more important to establish whether squirrels enjoy The Magic Flute.