It was a very good year for American movies, and no movie was more American in its vision than P. T. Anderson’s swaggering horror show about oil, religion and madness in the early 20th-century West. At its center is Daniel Plainview, a tall, gangly, beady-eyed prospector who emerges from a dark fissure in the earth—a mineshaft that doubles, perhaps, as perdition—to begin a single-minded, unholy quest to rule California’s lakes of black gold. Although Plainview’s hard work embodies the American…