Behavior: A Second Opinion from Jensen

Psychologist Arthur Jensen is not widely admired among liberal intellectuals. Last winter a number of prominent professors, including Anthropologist Margaret Mead, displayed some remarkably illiberal behavior by protesting Jensen's election as a fellow of the American Association for the Advancement of Science. The reason: he believes heredity accounts for most of the difference in average IQ scores between blacks and whites.

Jensen's now famous—or notorious —article appeared in a 1969 issue of the Harvard Educational Review under the title "How Much Can We Boost IQ and Scholastic Achievement?" His answer: Not much. His...

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