How does Grendel divide the world?

Grendel divides the world into two realms: the world of the Danes, and the world of the monsters. The Danes are characterized by their civilization, their religion, and their communal living. The monsters are characterized by their savagery, their individualism, and their isolation from one another. Grendel views the Danes with contempt, and he enjoys terrorizing them. He sees the monsters as his equals, and he is content to spend most of his time in their company.