Cultural conflict and Exchange

Recently I read the book The Tempest by William Shakespeare. The cultural exchange within the play The Tempest, is represented fairly obviously. There are a lot of rather intense moments in the book. To begin, Prospero makes a storm to wreck the pirate's ship that was out in the sea. This showed that he had lots of "magical" power. He had two slaves Caliban, and Arial, who obeyed to his every command. When she was looking for Caliban, he was hiding. It seemed as though he would try to avoid her because he let that the island that were on was his. That his family had owned it before Prospero did. They argued. It still isn't clear to me what Caliban was. He was used as a slave though. Arial also had a conflict with his "master." He claimed that Prospero wasn't being fair and that he owed him. Arial was the "spirit" that would create what seemed to be natal disaster or happenings. Basically whatever Prospero wanted. Arial created the tempest that separated all the pirates from their ship. A little later in the book Caliban was found by two idiot drunken pirates. After some friendlyish conversation they plotted to kill Prospero so that they could have the island to themselves.  Prospero eventually found out and seemed so upset that he didn't even punish Caliban. The pirates that found Caliban had made him their slave as well. it seems that ownership meant power. In the end of the book Caliban and Arial were set free. Throughout the entire book there was an assertive dominance that was used. Ownership meant power and everyone seemed to be power hungry. Overall, between the pirates, Caliban, Arial, and Prospero, there was constant tension between who owned what and who really had the power.