According to eve lore, humans had advanced and were looking for new space to colonize, don't remb exactly how it goes but they built the eve gate, gate to new Eden, there was some problems with the gate black hole or something that caused it to no longer function, leaving the colonists stranded in new Eden. Eventually they broke apart into new factions and began exploring space again and well. Hated each other, since so many years had passed each faction had begun its own government and customs.


Eventually they came across the Jove. Which looked human but not quite and are extremely technologically advanced.

I'd say Jove is the only one not human, but as been hinted as they too came from new Eden, just evolved.