PDF of The Bell Curve by Herrnstein and Murray.
The Bell Curve is the most elaborate book on IQ or g (general cognitive ability) to date. Despite being from the 90s, it holds up excellently.
Authors show how IQ is a better predictor than Socioeconomic Status, Race, or Education on metrics such as:
- Job Performance
- Good parenting
- Children Born Out of Wedlock
IQ deserves more research.