If you believe that humans are animals, there can be no such thing as the history of humanity, only the lives of particular humans. If we speak of the history of the species at all, it is only to signify the unknowable sum of these lives. As with other animals, some lives are happy, others wretched. None has a meaning that lies beyond itself.
There’s only one Earth, and it’s tiny, but evil human leaders avoid problems they don’t want to resolve by giving them names which make the problems sound like they’re taking place in a different world: they make people not care about other people dying of starvation by calling the place the dying live “the third world.