The Mismeasure of Man skeptically investigates "the abstraction of intelligence as a single entity, its location within the brain, its quantification as one number for each individual, and the use of these numbers to rank people in a single series of worthiness, invariably to find that oppressed and disadvantaged groups—races, classes, or sexes—are innately inferior and deserve their status."
http://en.wikipedia.org/wiki/The_Mismeasure_of_Man
Hmm... sounds interesting. *adds to list*