On the other hand, nuclear physics is also used for things like treating cancer. In that sense it's the perfect analogy: you don't really know where your resea

On the other hand, nuclear physics is also used for things like treating cancer. In that sense it's the perfect analogy: you don't really know where your research will end up. Did Rutherford split the atom to cure cancer? No, of course not. Most (or all?) people working on particle physics in the early 20th century would have been quite surprised to learn it would be used as such down the line. > If you had the atomic bomb, you probably wouldn't have shared it with Stalin's USSR or Hitler's Germany and, for that matter, Roosevelt's USA If I felt that it was plausible that the genocidal regimes of the USSR or Nazi Germany could have developed such a bomb (which was the case): yes, I absolutely would have shared it with the US.