^^^^^^^ CB: The character Mistuh Kurtz was probably an out an out white supremacist.
Conrad might fall into the category of liberal, in the sense of having a paternalistic savior attitude toward the "natives", a la "The White Man's Burden" (an avatar, or "heavenly" visitor to "earth") Thus, he writes a book exposing the extreme white supremacist, colonialist type in Mistah Kurtz.