Eloi
From The Time Machine by H. G. Wells.
Origin
A society of small, elegant, childlike adults. They live in small communities within large and futuristic yet slowly deteriorating buildings, doing no work and having a frugivorous diet.
Creation
The Eloi were created by The Time Machine's writer H. G. Wells in 1895.
The Time Machine
By the year AD 802,701, humanity has evolved into two separate species: the Eloi and the Morlocks. The Eloi are the childlike, frail group, living a banal life of ease on the surface of the earth, while the Morlocks live underground, tending machinery and providing food, clothing and infrastructure for the Eloi. Each class evolved and degenerated from humans. The novel suggests that the separation of species may have been the result of a widening split between different social classes, a theme that reflects Wells's sociopolitical opinions.
The main difference from their earlier ruler-worker state is that, while the Morlocks continue to support the world's infrastructure and serve the Eloi, the Eloi have undergone significant physical and mental deterioration. Having solved all problems that required strength, intelligence, or virtue, they have slowly become dissolute and naive. They are described as being smaller than modern humans, having shoulder-length curly hair, chins that ran to a point, large eyes, small ears, and small mouths with bright red thin lips. They are of sub-human intelligence, though apparently intelligent enough to speak, as they have a primitive language. They do not perform much work, and in the book when Weena falls into the river, none of the Eloi help her.
While one initially has the impression that the Eloi people live a life of play and toil-less abundance, it is revealed that the Morlocks are attending to the Eloi's needs for the same reason a farmer tends cattle; the Morlocks use the Eloi for food. This is why there are no old people, and why the Eloi seem to fear the dark.