Gangs of New York is such a sprawling, unfocused movie that I can almost imagine the filmmakers throwing up their hands and sighing, "Well, at least we've got Daniel." Because Daniel Day-Lewis's performance as Bill "The Butcher" Cutting holds the film together whenever it tends to sink into the banality of its revenge plot or to wander off into the eddies of New York City history. A historical drama like Gangs of New York needs two things: a compelling central story and an audience that knows something about the history on which it's based. But for all their violence and their anticipation of problems that continue to manifest themselves in the United States, the Draft Riots of 1863 and the almost two decades of gang wars that led up to them are mostly textbook footnotes to most Americans. Director Martin Scorsese's determination to depict them led to the hiring of a formidable team of screenwriters -- Jay Cocks, who wrote the story, and Steven Zaillian and Kenneth Lonergan, who collaborated with Cocks on the screenplay. Unfortunately, the narrative thread that they came up with is tired. As a boy, Amsterdam Vallon saw his father, an Irish Catholic nicknamed "Priest" (Liam Neeson), cut down by Bill the Butcher in a huge battle between the Irish immigrant gang, the Dead Rabbits, and Bill's Protestant gang, the Natives. Sixteen years later Vallon (Leonardo DiCaprio) returns to the Five Points neighborhood determined to get revenge on Bill, who has managed to make peace with many of the old members of Vallon's father's gang and to become a power-player aligned with Tammany Hall and Boss Tweed (Jim Broadbent). Vallon is introduced to Bill's criminal enterprise by an old boyhood friend, Johnny (Henry Thomas), and he begins to fall under Bill's spell -- along with that of a pretty pickpocket, Jenny Everdeane (Cameron Diaz). But the relationship between Vallon and Jenny stirs the jealousy of Johnny, who is smitten with her, and he reveals to Bill that Vallon is the son of his old enemy, leading to a climactic showdown -- one that just happens to occur simultaneously with the Draft Riots. There's a lot of good stuff in Gangs of New York, including Michael Ballhaus's cinematography and Dante Ferretti's production design -- the sets were constructed at Cinecittà Studios in Rome. But the awkward attempt to merge the romantic revenge plot with the historical background shifts the focus away from what the film is supposedly about: racism, anti-immigrant nativism, political corruption, and exploitation of the poor. "You can always hire one half of the poor to kill the other half," Tweed says. Oddly (and sadly), Gangs of New York seems more relevant today than it did in 2002, when the country was recovering from the 9/11 attacks. Then, the Oscar-nominated anthem by U2, "The Hands That Built America," which concludes the film seemed to promise a spirit of unity, an affirmation that the country had overcome the antagonisms depicted in the movie. Today it has a far more ironic effect.