 Tolkien calls Denethor

In contrast, Jackson portrays him as a grumpy, cowardly, incompetent and weak ruler who works against his kingdom's defence.Daniel Timmons writes in the "J.R.R.Tolkien Encyclopedia" that Jackson "dramatizes the insidious temptation to evil", and that through "the falls of Saruman, Denethor, and Sauron, we see the bitter fruits of the lust for power and its corrupting influence."