Through critiques of nationalism and of imperialism, Fanon presents a discussion of personal and societal mental health, a discussion of how the use of language (vocabulary) is applied to the establishment of imperialist identities, such as colonizer and colonized, to teach and psychologically mold the native and the colonist into their respective roles as slave and master and a discussion of the role of the intellectual in a revolution. Fanon proposes that revolutionaries should seek the help of the lumpenproletariat to provide the force required to effect the expulsion of the colonists. In traditional Marxist theory, the lumpenproletariat are the lowest, most degraded stratum of the proletariat—especially criminals, vagrants and the unemployed—people who lack the class consciousness to participate in the anti-colonial revolution.