When the time traveller propels himself so far into the future, what he ends up witnessing is a logical extrapolation of certain capitalistic tendencies that Wells saw in his time: for example, the widening split between the rich and the poor.  In the future, these classes have evolved into separate races.  The elio, heirs to the upper class elites, play and rest all day and dine on flowers, but they are very dull witted.  They huddle for safety in the night, because that's when the Morlocks, heirs of the suppressed lower class, come up from the machinery beneath the surface of the ancient city to pick the Elios off as food.  The balance of power has reversed, and everyone suffers the consequences.  The time traveller concludes, “We should strive to welcome change and challenges, because they are what help us grow. With out them we grow weak like the Eloi in comfort and security. We need to constantly be challenging ourselves in order to strengthen our character and increase our intelligence.”