I knew that Heisenberg did not emigrate when the Nazis took power, but I was shocked to learn that he tried to help the Nazis get the atom bomb. This is textbook irrationality. Here's one example of irrational behavior. 1. You want A 2. B prevents the acquisition of A 3. You do B 4. Therefore you can't have A That's what Heisenberg did. If Hitler actually obtained the bomb via Heisenberg then Heisenberg's more important goals, notably staying alive, would have become impossible.