“As this book will show, objectively defined races simply do not exist. Even Arthur Mourant realized that fact nearly fifty years ago, when he wrote: 'Rather does a study of blood groups show a heterogeneity in the proudest nation and support the view that the races of the present day are but temporary integrations in the constant process of . . . mixing that marks the history of every living species.' The temptation to classify the human species into categories which have no objective basis is an inevitable but regrettable consequence of the gene frequency system when it is taken too far. For several years the study of human genetics got firmly bogged down in the intellectually pointless (and morally dangerous) morass of constructing ever more detailed classifications of human population groups.”

“In the United States both scholars and the general public have been conditioned to viewing human races as natural and separate divisions within the human species based on visible physical differences. With the vast expansion of scientific knowledge in this century, however, it has become clear that human populations are not unambiguous, clearly demarcated, biologically distinct groups. Evidence from the analysis of genetics (e.g. DNA) indicates that most physical variation, about 94%, lies within so-called racial groups. Conventional geographic "racial" groupings differ from one another only in about 6% of their genes. This means that there is greater variation within "racial" groups than between them. In neighboring populations there is much overlapping of genes and their phenotypic (physical) expressions. Throughout history whenever different groups have come into contact, they have interbred. The continued sharing of genetic materials has maintained all of humankind as a single species.”

“For, as I have suggested, disruption of the unity of the self is not limited to the cases that come to physicians and institutions for treatment. They accompany every disturbance of normal relations of husband and wife, parent and child, group and group, class and class, nation and nation. Emotional responses are so total as compared with the partial nature of intellectual responses, of ideas and abstract conceptions, that their consequences are more pervasive and enduring. I can, accordingly, think of nothing of greater practical importance than the psychic effects of human relationships, normal and abnormal, should be the object of continues study, including among the consequences the indirect somatic effects.” – The unity of the human being”

“Random mutations much more easily debilitate genes than improve them, and that this is true even of the helpful mutations. Let me emphasize, our experience with malaria’s effects on humans (arguably our most highly studied genetic system) shows that most helpful mutations degrade genes. What’s more, as a group the mutations are incoherent, meaning that they are not adding up to some new system. They are just small changes - mostly degradative - in pre-existing, unrelated genes. The take-home lesson is that this is certainly not the kind of process we would expect to build the astonishingly elegant machinery of the cell. If random mutation plus selective pressure substantially trashes the human genome, why should we think that it would be a constructive force in the long term? There is no reason to think so.”

“I do detest the human race as a whole, but some groups are more deserving than others,”

“A living man can be enslaved and reduced to the historic condition of an object. But if he dies in refusing to be enslaved, he reaffirms the existence of another kind of human nature which refuses to be classified as an object.”