So the racial tension that persists in America, long after the majority of whites accepted the equality of opportunity as espoused by Martin Luther King, persists because whites have been telling blacks that they would end up just like them once racism was over. Equality of outcomes requires that groups be absolutely equal, but genetic dissimilarities cause disparate outcomes. The accusation that whites hold blacks back has now turned desperately to a demand for compensation for the damage done. If equal opportunity requires that equal results be earned, and that end is not met, then blacks will go for the quick buck. But the evidence is just not there.
Whites owe nothing more because whites have done nothing wrong.
What has been done 'for' blacks to date has been done only because whites have unilaterally tried to help them beyond anything deserved because of injustices. Any injustices done have been adequately paid many times over. Levin not only summarizes the data showing why the differences between races and groups is genetic but he also lays a firm foundation explaining the philosophy of science that is the foundation for such claims. The reason for believing that IQ is genetic between races is that it is genetic between individuals, and no other explanation has been found to account for the race differences. Science works on the principal of parsimony, the simplest answer is the one accepted unless it can be displaced by a better one.