Something I've always wondered, which nobody talks about, is one of the differences between the FF and the Challengers that made them iconic. Their personalities match their powers. We all know that.
However, not many people talk about how their powers/personalities correspond to the classical Greek elements of earth, air, fire and water. The FF ARE ELEMENTALS.
Is there any documentation of THIS particular part of their invention? And whose idea was it? I'm pretty sure we can guess pretty accurately.