At some point, the Morlocks, who had continued providing for the helpless Eloi (the Time Traveler guesses this may at first have been out of tradition or intrinsic habit) began feeding on their above-ground counterparts and now raise them like cattle to serve as their food supply.
They do not perform much work, except to feed, play, and mate, and are characterized by apathy; when Weena falls into a river, none of the other Eloi move to help her (she is rescued instead by the Time Traveler).
A portion of the book written for the New Review version, later published as a separate short story, reveals that a visit by the Time Traveler to the even more distant future results in his encountering rabbit-like hopping herbivores, apparently the descendants of the Eloi.
In the 2002 movie adaptation of The Time Machine, the Eloi are depicted as identical to modern humans with a hunter-gatherer lifestyle and sport primitive-style clothing and appear to be an ethnic amalgamation of various indigenous races but maintain the English language as an intellectual exercise.
The Eloi are technically adept but do not understand the technology; they regress and unlearn millennia of culture, thought and reason, until they are satisfied with the pleasure of merely existing.