Who is Professor Bernardo de la Paz from The Moon Is a Harsh Mistress and what is their importance?

An intellectual subversive shipped to Luna from Lima, Peru, Prof is easily the novel's most complex and dominating character. Born ca. 2000, Prof is the protagonist and narrator's former teacher. They reunite at a political rally in which Prof disagrees with Wyoming ("Wyoh") Knott's "eloquent manifesto," by insisting Luna must embargo everything and become self-sufficient. Prof decides that he, Manuel ("Mannie") Garcia O'Kelly-Davis, and Knott are the perfect revolutionary cell, and pushes past Davis' reluctance. Prof's code name is Bill. He describes himself as a "Rational Anarchist," believing only self-responsible individuals act (not governments) and that blame, guilt, and responsibility cannot be shifted, shared, or distributed, Prof takes for granted that all efforts are less than perfect.