Tempest by William Shakespeare

I think the contrasting histories of usurped magician/king (Prospero) and disgraced island monster (Caliban) help to give added conflict and texture to the story. We understand Prospero's need for revenge and to set things "right" again. We also understand Caliban's subservience to Prospero. Caliban becomes Prospero's only subject, doing all of his dirty work; Caliban tries to rape Miranda, and is shunned by both Miranda and Prospero because of this. Both Prospero want a sort of freedom that was taken away from them.