Professor Bernardo de La Paz is one of four main characters in The Moon is a Harsh Mistress, a science fiction novel by Robert A. Heinlein. He is an old revolutionary from Bolivia (hence "of La Paz"). Sometimes called "Prof", he earns his living by tutoring people on the Moon, one of them the novel's protagonist, Manny (Manuel). He calls himself a rational anarchist, but is really a libertarian.