Hunger," Hollerbach said. "The universal imperative. - Stephen Baxter

They talked further, an incoherent conversation of disconnected fragments, peppered by misunderstanding, suffused by mistrust.

Her story was a creation myth, a legend already more than twenty thousand years old. Such tales—which said that Jahna’s people were the pinnacle of creation, that theirs was the only right way, and that all others were less than human—taught the people to care passionately about themselves, their kin, and a few treasured ideals.
But to the exclusion of all other humans, let alone such non-people as the Old Man’s kind.

If you were anywhere near the center of human affairs, even to the extent that she was, your predominant emotion had to be disappointment at the way in which an age when opportunities for humanity had never been greater, old flaws—territorialism, combativeness, reluctance to transcend cultural barriers, a sheer inability simply to see things from the other guy’s point of view—looked set to bring the sky crashing down on all their heads.