When I first saw Rope, as a young college student, I didn't really appreciate it. Sure, the illusion of the 82 minute continuous shot was impressive. Watching the "perfect" murder fall in on itself was satisfying. But now, having lived some life, and especially in light of recent events, Rope is more poignant than ever.
Rope was Hitchcock's first color film and is based on a play, which was in turn inspired by actual events. Two gay men attempt to commit the perfect murder, and then ghoulishly host a dinner party at the scene of the crime, going so far as to serve the meal on the trunk in which the body is hidden.
In an even more perverse flourish, they invite the victim's parents, girlfriend, and her ex-boyfriend. But they make one mistake: they also invite their prep-school headmaster (played by James Stewart, who was looking for more serious roles after the War). The headmaster is one of those people who is rude because he thinks he's smarter than everyone else, and it was his philosophy that unintentionally inspired the murder.
See, our murderers feel that they belong to a class of intellectuals who have the right to kill their inferiors if they feel like it. One of them spouts his philosophy at dinner, to which the victim's father objects, noting that Hitler thought the same thing. But no, no, our killer says: he's, well, in modern parlance, an anti-Fascist.
To Stewart, the idea is completely rhetorical, and he initially and cheerfully goes along with it. Only in the end, when he begins to suspect that his rhetoric has led to actual consequences, does it break him. When you stop to think about it, any moral code not rooted in "Do unto others as you would have them do unto you," leads society to dark, dark places. In his closing monolog, Stewart dismantles his old philosophy in favor of the ancient one.
If you haven't seen Rope, or not seen it recently, it's worth watching now.