The tempest was a theatrical performance celebrated in 1611 its author is William Shakespeare.
The history context around this play was the process of colonization of europe to America. Specificity Shakespeare intended to show the interest about the efforts of English and other European settlers.
According the above mentioned is very clear to identified character relationship, phrases, words about the language power of colonizers . For Example: Prospero views Caliban as a lesser being than himself.
Prospero does believe that Caliban should be grateful to him for educating Caliban and lifting him out of condition "Salvagery".