So to summarize, we have a fairly good idea of Heisenberg’s position on nuclear war at the close of WWII, but there’s quite a bit of uncertainty around how much his position was changing at the time.
> One reason is that only the transcripts of conversations from Farm Hall survive, not the original recordings. (Those recordings were never kept: Tape-recording technology was in its infancy in 1945, and the conversations were recorded on shellac disks that were resurfaced and reused after their contents were transcribed.)
Interestingly, during the war, it was the Germans who had made rapid advances in tape recording technology. It was in that same year that Jack Mullin acquired the German recorders from Bad Nauheim and would later demonstrate their technical superiority to amazed audiences in America: https://en.wikipedia.org/wiki/Magnetophon#History . Astounding to think that if that technology had been disseminated a bit earlier and faster, we might still have access to these recordings.
Robert Jungk, the journalist mentioned in the article, was much more than a journalist. There's an overview of his many activities, which included pioneering work on futurology, on the Robert Jungk Library for Future Issues website [1].
