I think if there is a spectrum in interactions between the two forces joined by this spectrum would be considered one force. Of course, there is a history of fo

I think if there is a spectrum in interactions between the two forces joined by this spectrum would be considered one force. Of course, there is a history of forces that once appeared to be distinct turning out not to be distinct but one and the same force instead. There is a line of thinking that speculates that all four known forces are to be joined in one.