Most people don't think much about community in The Time Machine. After all, it's more the story of a species than a community, right? While this is the story of a species (and social classes within that species), it's also the story of community. It's about finding people to share feelings with and a place you can call home. We may overlook this because, in many ways, the Time Traveller is a man without a community: whether he's in the 1890s or in the far future, he's surrounded by people who don't really understand him. This doesn't mean he's totally alone or has no community, though. For instance, in the future, he starts to feel at home because of Weena and seems to absorb the Eloi's feelings. So we find community even when we don't expect it.
The Time Traveller is able to do and see the things he does because he doesn't fit into any particular community. His outsider perspective allows him to see the possibilities of time travel.