The concept of revenge and retribution that occurs in The Tempest is also relevent to modern times. Prospero feels seriously wronged by Alonso and Antonio, so when he learns that Alonso's boat is near the island, he has Ariel create a storm to wash the boat onto the island. From there, he is able to turn the men's lives upside down in order to seek revenge for the wrong that was done to him in Milan.
Further, Caliban hates Prospero for having killed his mother Sycorax and then turning him into a personal slave on the island that is his rightful home. When Caliban meets Trinculo and Stephano, he feels that they have power and influence and makes a plan with them to overturn Prospero. Caliban wants revenge for the life of servitude that Prospero has made him suffer.
These ideas are still relevent in modern times as people seek revenge for wrongs that have been done to them.