Eugenics was all the rage in the first half of the 20th century, until it wasn’t any more. This book purports to tell us what it is, what it isn't and how it came to be such a dominant force in shaping the policies of that time.
The author does a wonderful job in recounting the history of this movement, beginning with its ancient predecessors in Greece, and takes us all the way up to present day attempts at controlling the evolution of the human race. Another thing Rutherford does well is making a distinction between ethical uses of the science of genetics and its unethical uses, past, present and future possibilities.
The book is aimed at the broadest audience possible. It's short and it deals with a huge amount of material very efficiently. Rutherford is very good at keeping his facts tidy and well organised and keeps his essay diligently on topic. Thankfully, the main doctrine of eugenics and its misuse are easy to debunk since, in hindsight, all of the eugenics policies implemented in different countries like the USA or Nazi Germany, which were conceived as aids for the betterment of mankind, have had zero or negative effects on their target population. This is the best part of the book.
The most interesting part of the book is the second, which deals with the application of current scientific research in genetics (the de facto child of the eugenics movement) to screening the DNA of embryos for genetic disorders like Down – currently a universally accepted medical practice, to the genetic screening and engineering of embryos for specific genes, especially aimed at increasing intelligence. In short, of the last two, the first approach brings statistically lower gains to IQ than tweaking some environmental variables, while the second one is currently illegal and extremely dangerous with the currently available technology.
I would have liked to read more about hypothetical scenarios and their plausibility. However, the author does not extend any philosophical argument beyond its mere acknowledgement in his text, although he vaguely draws near to a kind of conservative humanism in the sense that human life is valuable, even if it's genetic makeup is flawed, but that parents are free to decide if they want to keep a pregnancy when they find out that the baby will be born with an incurable, debilitating, genetically determined syndrome like Down.
So this is a book that plays it safe from most every point of view. The subtitle is a bit clickbaity, in the sense that it promises a lot more than it delivers. Eugenics got a lot of stuff wrong at first, like any science, and the worst part is that people were using it to drive social policies that, as Rutherford demonstrates, helped absolutely nothing and no one. The name fell out of favour after the war, and by 1970-1980 all eugenics departments became genetics departments. And they continue to try to understand the relationship between genes and the environment in the makeup of a human. His high-level conclusion to what determines the outcome of specific traits is that it’s complex, it depends on a case by case basis and genetics is in very few cases the sole determinant of a specific condition.
The “troubling present“ part is more an indeterminate foggy and conficing present, where research is being made to improve the human genome and this would allow rich people to raise their kids as a new breed of genetically enhanced humans. The author talks about CRISPR, the most advanced and most precise technology available for gene editing and shows that, in its current state of development, it is not yet as precise as it needs to be, although he allows for the caveat that it may reach that precision in the future. (currently gene modifications may still scramble a few letters in their mutations and any change which is not exact would create a completely unknown, unstudied, dangerous and potentially lethal variant)
This is a great book for the general public, full of facts and figures, but told in a very appealing style. It does many things right, linking important historical characters with their views and their times, but also discussing their legacy, keeps the whole history concise and interesting and also throws in a few introductory scientific notions for genetics. I don’t remember hearing about other books on the subject in the audiobook, so I guess people interested in diving deeper in the subject have to do a bit of research on their own.