"That the word intelligence describes something real and that it varies from person to person is as universal and ancient as any understanding about the state of being human." Chap. 1, Cognitive Class and Education, 1900-1990, p. 1

"Measures of intelligence have reliable statistical relationships with important social phenomena, but they are a limited tool for deciding what to make of any given individual." Chap. 1, Cognitive Class and Education, 1900-1990, p. 2

"To say that most of the people in the cognitively demanding positions of a society have a high IQ is not the same as saying that most of the people with high IQs are in such positions." Chap. 1, Cognitive Class and Education, 1900-1990, p. 27

"An IQ score is a better predict of job productivity than a job interview, reference checks, or college transcripts." Chap. 4, Steeper Ladders, Narrower Gates, p. 64

"Low IQ continues to be a much stronger precursor of...