This is a difficult book to evaluate. On the face of it, it investigates what happened to physics under National Socialism in the Third Reich, concentrating particularly on three scientists, viz. Max Planck, Peter Debye and Werner Heisenberg. However, my reading of it is that Philip Ball's primary motivation in writing this book was to investigate the question of what responsibilities scientists owe society as a whole under any form of government, and in particular, the role that moral choices play in this regard. Towards this end, he looks at the most extreme example of this dilemma, namely the response of German Science to living under the Nazi regime. A book with the title "The struggle for the soul of science" won't have much appeal; a book with Hitler , specifically, and Nazis, implicitly, in the title is going to sell much better. The difficulty with the book is figuring out what Ball is trying to say. On the one hand, he correctly points out that the belief that only democracies can nurture scientific creativity (a view that many in the science community would concur with) is a myth. The historical record clearly shows that scientific creativity can flourish under totalitarianism (both left and right) and dictatorships. Nazi Germany may have failed to develop nuclear weapons, but it did develop rockets and jet aircraft. During the Cold War, when state oppression in the Soviet Union was more extreme than in Nazi Germany, Soviet scientists were capable of inventive scientific research. Today's Chinese scientists are proving that, despite the rote learning of China's traditional education system, democracies have no monopoly on creativity. On the other hand, he also puts the case that scientists have a moral and professional responsibility to society as a whole beyond just being responsible for the calibre of their research, or formally responsible in a bureaucratic sense when in administration. As for his own position, it is not easy to ascertain, although he does drop hints here and there.
As for the three German scientists investigated in the book (although many more are mentioned throughout the narrative) the picture is mixed. Max Planck's case is a tragic one; he was what one would call of the old school, cautious, conservative, traditional and nationalistic. His nationalism was nothing like that of the Nazis; not jingoistic, instead he was dedicated to the service of the state and homeland. Tragically, the nature of his character meant that open defiance to constituted authority was unthinkable. Consequently, he was tempermentally unable to provide any effective opposition to the National Socialist regime after 1933. Coupled with the loss of one son in WW1 and another in WW2, he died in 1947 a broken man. The case of Peter Debye is uncertain. Dutch by birth, he spent over three decades working in Germany, and only escaped to the US in 1940 when the Nazis gave him an unacceptable ultimatum: convert to German nationality to be able to continue to work in Germany. During the war, he did not work on the Manhatten Project mainly because his security clearance did not come through until 1945 (some people suspected him of being a German spy). In 2006, a Dutch journalist wrote a book accusing him of Nazi collusion. An examination of the record shows that there is nothing to this accusation. Nevertheless, questionmarks remain, mainly because of his character: intensely private (he kept no diary), he cared only about science, and nothing about politics. Consequently, he was politically naive, with the result that the least worst accusation made about him was to be guilty of opportunistic behaviour. The problem is that we don't know why he did what he did; this leaves us with the anomalous Scottish verdict of "not proven". The case of Werner Heisenberg is clearer: like Planck, he was conservative and nationalistic, but without moral scruples. He was only concerned with the "honour" of German physics and possessed the ego to believe that only he could "save", or preserve, it. Consequently, he was prepared to cooperate with the Nazi regime and never apologised for this after the War, instead proceeding to perform (along with others) a "whitewash" of the reputation of German physics. He is not a sympathetic character.
In conclusion, this is an interesting book, which has been marked down because of the uncertainty about what the author is trying to say. Nevertheless, it does raise important questions about the responsibilities of science to society as a whole under any type of regime.