You aren't doing much for morale, Sidewise." Sidewise shot back, "And what about my morale? It does me no damn good to ignore what's blindingly obvio… - Stephen Baxter

Anyhow, she knew when she looked into her heart she’d never really wanted kids anyhow. She’d seen how kids dropped from the sky and exploded people’s lives like squalling neutron bombs. She was honest enough to admit she was too selfish for that; her life, her only life, was her own.

I was struck by how ignorant we humans are, or make ourselves, of the passage of time itself. How brief our lives are!—and how meaningless the events which assail our little selves, when seen against the perspective of the great plastic sweep of History. We are less than mayflies, helpless in the face of the unbending forces of geology and evolution—forces which mold inexorably, and yet so slowly that, day to day, we are not even aware of their existence!

But what would humans do, she mused, if they stumbled on a situation like this?
Well they wouldn’t be satisfied with the generosity of Candyland. They’d breed until the caves were overflowing. The hunters would start ranging farther until all the animals in the area were eaten or driven away. Then agriculture would start, with everybody forced to bend their bodies to back-breaking toil, day after day. As the population exploded the forests would be cut back, the animals decimated.
Then would come the famines and the wars.