The Time Machine is interested in issues of social inequality and justice – in how to best organize our society so that we can live with each other without oppression. In Wells's time, there was worry that the split between the "haves" and the "have-nots" was going to lead to violence. Today, well, maybe we're not so worried about violence, but people still worry about the split between the rich and the poor. From the 1890s to our own time, people still work on the question that seems central to The Time Machine : What's the best, most just way for society to be?
The Time Machine hasn't stayed in print for over 100 years just because Wells invented the idea of a machine that would move through time. Rather, it seems that Wells's book has remained in print because, even though much of the world has changed, certain issues haven't. Wells would be amazed at our iPods, but he wouldn't be surprised that some people have them and others don't.