This is a very challenging and rewarding book to read. Gould makes no bones about his intention to make the reader rise to the material rather than sink the material to the lowest common denominator. This is a very technical and educational refutation of The Bell Curve. This book explains the problems with standardized testing, IQ tests and even the concept of IQ. Gould has forced me to re-analyze many concepts and ideas that I felt were the bedrock of our culture. It explains the origins of IQ and the Army Alpha as well as their shortcomings. This is an important and rewarding book to read.