Edward Teller was first tasked with answering the question whether the entire world would explode in a nuclear chain reaction, since that was considered a possibility before the studies were concluded. So, for a time, the question of destruction of the world was on the table. Apparently, Teller’s calculations were correct when he said the world would not explode. I recall seeing an interview of him many years ago in which he discussed this.
I’m the movie the calculations that it won’t explode fall upon one of the theorists
Not Teller
Though he comes up with the possibility