'This anthology provides an excellent overview of the research on test score gaps and their empirical relationship with and possible theoretical explanation through genetic factors. Widely scattered individual works are brought together in one volume and presented with an introductory text that is understandable to a broader public. A must-read for everyone interested in the topic and especially for those who are initially skeptical about this research but want to get to know it better for a fruitful scientific discussion.'Dr Heiner RindermannnProfessor of Educational and Developmental Psychology at Chemnitz University of Technology, Germany, and author of Cognitive Capitalism: Human Capital and the Wellbeing of Nations'If you are a quantitative social scientist, you have a responsibility to wrestle with the material in this book. It is important that you do it partly because the genetics of differences in test scores is of the utmost relevance to a wide range of topics involving both scholarly issues and public policy. There is also a larger reason. It is important that you treat its arguments as legitimate scientific inquiry to help rescue social science from the dark age of censorship and ideological orthodoxy into which it has fallen.'Charles MurrayF.A. Hayek Emeritus Scholar at the American Enterprise Institute, and co-author (with Richard Herrnstein) of The Bell Curve.