If I may suggest it, The first question for anyone to ask is WHY anyone should pay any attention to Horowitz's book? Assertions are not evidence, and he makes some wild ones.
He is not a social scientist or social science scholar, yet presumes to judge social science research such as mine--probably having read only a little of it.
I have done research on racial and gender discrimination, in 49 books and 180 research articles and monographs, over 42 years now. Have been president of the American Sociological Association. Have won many scholarly awards, including one from the Harvard Alumni/Alumnae association last week.
What has Horowitz done in his career to justify paying attention to his assertions? Assertions are not evidence. If he asserted the moon was made of green cheese, would anyone pay attention to him? Of course not.