For Fanon in "The Wretched of the Earth", the colonizer's presence in Algeria is based on sheer military strength. Any resistance to this strength must also be of a violent nature because it is the only "language" the colonizer speaks. Thus, violent resistance is a necessity imposed by the colonists upon the colonized. The relevance of language and the reformation of discourse pervades much of his work, which is why it is so interdisciplinary, spanning psychiatric concerns to encompass politics, sociology, anthropology, linguistics and literature.