Like the best of David Lean's films, The Bridge on the River Kwai is sweeping but personal, a formal masterwork that ultimately operates to deepen the moral ambiguity and humanity of its primary characters. The film plays out as two separate battles of wills, both of which converge under the shadow of a railroad bridge being constructed for the Japanese war effort by Western prisoners of war. From these mind games emerges a moral portrait of the conflicting feelings in war: there are no heroes in this film, nor truly any villains. In a time when crowing about the war was still all the rage—hell, has back-patting about WWII ever gone out of fashion among the Allies?—Lean shows the warping effect of conflict on all men, how one can see right through the ridiculous code of military conduct of one side and utterly fail to see the absurdities in one's own.Lean's gift for finding the human touch even in his most technical, grandiose moments is evident from the first moments of the film. A graceful crane shot through dense jungle spills out into a narrow clearing showing railroad tracks and mound graves with rudimentary crosses made of bamboo marking the dead. A group of British soldiers march through the jungle, the boisterous music belying the less-inspiring truth that they are headed to a Japanese POW camp following the surrender of Singapore. From the moment the unit's leader, Col. Nicholson (Alec Guinness), steps into camp, we see he's going to be a problem. He has his men march as if on parade, whistling proudly even as shots focusing on their torn shoes and quivering legs undo any sense of the Brits' strength. What at first seems Nicholson's gesture of defiance eventually becomes the first sign of madness implanted by his capture.