Thank you, for the post! Prospero is one exile, but Sycorax was also exiled, to the same island, and not executed in consideration of her pregnancy. (Because the kill a pregnant prisoner is to kill the unborn child - which hints (maybe?) that we can extend the exiles theme to both Caliban and Miranda.)

It's a comedy, so wrong doesn't triumph, but Caliban burns with murderous resentment all through. There's also the line somewhere in the play that "death pays all debts".

(Yes, what a cheek, to be angry because his brother, actually doing all the work of Duke, would like the title, too! c.f. Lear, who also skives off, though not as learnedly.)