The introduction gave a good overview of the book, perhaps it gives away too much and is too bold for in introduction, but it is what it is and it makes no qualms about the conclusion of the research. Chapter one sets the scene for how to approach the book. I think the best advice to the skeptic is given here:
It will be easy for the reader to be prejudiced since many of the applications suggested are not orthodox. I suggest that conclusions be deferred until the new approach has been used to survey the physical and mental status of the reader's own family, of his brothers and sister, of associated families, and finally, of the mass of people met in business and on the street. Almost everyone who studies the matter will be surprised that such clear-cut evidence of a decline in modern reproductive efficiency could be all about us and not have been previously noted and reviewed. p6It is true that looking around we can see examples of malnutrition in many people: friends, neighbors, even family members. Susan and I received a photograph of a large family this past year's end and it is remarkable how apparent the physical health of the children is different. There are seven children in the family and without prior consultation, Susan and I both picked out the same child as the healthiest. This is not a discrimination against the others, merely an observation as to who is obviously the healthiest, and by extension, the nutrition of the mother and father before the birth of each child.
At any rate, I read the above quote in the book and said to myself, but of course - all anyone has to do is look around and see that there are healthy people, and unhealthy people - and there is a reason for it - IT IS NOT CHANCE!