2017 03 03 - bell curve - and the we cant ever talk about this

SO I remember listening to right wing radio (NPR) (sarcasm) when this book came out.
Listening to people rant and revile the authors.
When the interviewer asked, if they had READ THE BOOK, the ranters always answered NO.

Any here read the book?
What was the conclusion again?
How much of the book compared white, asian and black, vs looking only at white?

My memory, from 23 years ago .... the majority of the stats and book, were about white males.
And that one of the conclusions from the book, was that environment AKA how rich or poor your parents were, was one of the things that we CAN CONTROL, and that Head Start had a huge benefit in helping poor kids.  (this was once again, based on data that was only about white males, and the replicated in the other data)

https://en.wikipedia.org/wiki/The_Bell_Curve#Criticisms
[[ If the reader is now convinced that either the genetic or environmental explanations have won out to the exclusion of the other, we have not done a sufficiently good job of presenting one side or the other. It seems highly likely to us that both genes and environment have something to do with racial differences. What might the mix be? We are resolutely agnostic on that issue; as far as we can determine, the evidence does not yet justify an estimate.[14] ]]

Funnier still, the introduction discussed this, that environment and genes pay some unknown percentage of IQ. More than zero, less than 100%.