The importance of this book is that it explains that racism is rational. That is, by favoring people of one's own race, a person is increasing his fitness. This means that the anti-racists are trying to convince people to lower their fitness and eventually go extinct. In evolutionary terms, racism is adaptive and anti-racism is maladaptive. A further implication is that racists are in harmony with man's nature (indeed, the nature of all living things - to pass on the unique forms of one's genes), and that anti-racists, who go ballistic at any tinge of racism, are psychologically pathological.