> we discover a new, non-electromagnetic way to communicate reliably over vast distances I was going to say that of the 4 currently known fundamental forces, o

> we discover a new, non-electromagnetic way to communicate reliably over vast distances I was going to say that of the 4 currently known fundamental forces, only gravitational and electromagnetic interactions lend themselves to long range communication. However, there seems to be ongoing research about an actual fifth force that might be related to dark matter: https://en.wikipedia.org/wiki/Fifth_force https://en.wikipedia.org/wiki/Fifth_force