Because of his lack of European descent, Caliban as always had the short end of the stick. Once Sycorax died, Caliban thought the island would be his, although Prospero took it away without Caliban fully realizing what he was doing. Once Caliban became involved with Stefano and Trinculo and some alcohol, he began to feel like he might be able to get his island back with his plan.
“Having first seized his books; or with a log batter his skull, or paunch him with a steak, or cut his weasand with thy knife” (3.2.84-86).
Caliban may have succeeded if it wasn’t for two events. The first being that Ariel overheard the conversation where Caliban told his plan and then the fact that Stefano and Trinculo ruined the plan by falling for the trap that Ariel had set up, despite Caliban’s protest.
Trinculo: O King Stefano, O Peer! O Worthy Stefano, look what a wardrobe here is for thee!
Caliban: Let it alone, thou fool, it is but trash.
This play being a Romance, a subgenre of comedy, Caliban is the only one who doesn’t get his happy ending or its not even alluded to. Once Ariel brings Caliban, Trinculo, and Stefano, Caliban only scolds himself for being silly.
“Ay, that I will; and I’ll be wise hereafter, and seek for grace. What a thrice-double ass was I to take this drunkard for a god and worship this dull fool!”(5.1.298-301).
And that’s the last we really see of Caliban. His spirit is completely downtrodden, never to try again to reclaim his land because he feels so overpowered by the power of Prospero. Even though it would be easier for him to try again since Prospero gave up his magic.