An additional theme is the morally ambiguous conflict between humankind's growth and development and Nature's need for preservation. According to the "Chicago Sun-Times"'s Roger Ebert, "It is not a simplistic tale of good and evil, but the story of how humans, forest animals and nature gods all fight for their share of the new emerging order." Billy Crudup, who provided the English voice for Ashitaka, said "The movie was such an entirely different experience; it had a whole new sensibility I had never seen in animation. It also had something profound to say: that there has to be a give and take between man and nature. One of the things that really impressed me is that Miyazaki shows life in all its multi-faceted complexity, without the traditional perfect heroes and wicked villains. Even Lady Eboshi, who Ashitaka respects, is not so much evil as short-sighted." Minnie Driver, the English voice actress for Lady Eboshi, commented similarly: "It's one of the most remarkable things about the film: Miyazaki gives a complete argument for both sides of the battle between technological achievement and our spiritual roots in the forest. He shows that good and evil, violence and peace exist in us all. It's all about how you harmonize it all." Anime historian Susan Napier said there is no clear good vs. evil conflict in Princess Mononoke, unlike other films popular with children. Based on the multiple point of views the film adopts, San and Lady Eboshi can simultaneously be viewed as heroic or villainous. San defends the forest and viewers empathize with her. But she also attacks innocent people, complicating how we evaluate her. Opposed to San, Eboshi tries to destroy the forest and could be considered a villain. But everything she does is out of a desire to protect her village and see it prosper. San and Lady Eboshi survive until film's end, defying the usual convention of good triumphing over evil with the antagonist defeated. Napier concluded that the resolution of the conflict is left ambiguous, implying that Lady Eboshi and San will be able to come to some sort of compromise. The ambiguity suggests that there are no true villains or heroes.