actually in 100 years, expect a totalitarian society as described by the great writer George Orwell in Animal Farm, 1984, and Fahrenheit.
Actually since we pretty much live in that society already, only a fool would assume that they would give up there power.
Theyve already destroyed 90% of the infrastructure that we would need in order to mobilize the nation to create enough supplies to fight WW2.
Theyve already managed to create a society in which the only thing that matters is instant gratification and nonstop luxury pampering. Look at the 6 year olds getting daily manicure and spa treatments, and then look at the socalled social workers, psychologists and "intelectual" portions of the world who tell us that we must go into debt to do that for our children or well be horribly "abusing them".
Look at Japan in the last decade. Theyve re written their history books and have a whole generation of japanese citizens who actually believe that the japanese military did absolutely nothing to anyone in ww2 other then to send in NATO style "peacekeapers" into china to "prevent mass war on japan" from chinese forces that had no interest in fighting japan.
So in a hundred years, this whole world is going to be so screwed up, that the surface dwellers in "The Time Machine' will have better luck when they go into the orlock caves when the bomb sirens go off.