They realized that this world was hopeless. That the end was nigh. And in the last instances of humankind they retreated elsewhere for they were The Elses. Out into the forest they went rejecting mere surival and focusing on the else. Things like playing the cello for endless hours day after day for decades. Totally useless stuff. Living off fruit and nuts and low and behold living much longer as a side effect. But rarely ever breeding. More androgynous, more often gay, away from survival and reproduction. Off into silly stuff. Away from reality. But capable of doing well at mere survival as they were more intelligent than average, intelligent enough to have turned away in the first place. Above average fighters. Much faster and smarter but much smaller and thinner and would almost always simply turn and run away. Generally they hated man but didn't dwell upon him. Few let hatred burn them up.
They were few of course. Far, far fewer than man. How else could they be the else? And of course they rarely bred, and never take on wars of conquest. Instead they just forever retreat. On the other hand, they lived longer and were generally smart enough to stay the hell away from men, generally smart enough to find places to hide. So then, there existed small pockets of heaven, if you could ever find them. But they'd rather you didn't. Even the best men just infect their heaven with ugliness. As the warring races of men have the most offensive and sick norms ingrained so deeply into everything they do.