The normal line on Rope is that the long takes are a magnificent stylistic experiment, but the story is limp. Don't believe it. See it on the big screen, and the style and narrative will coil around one another to create an unsettling chamber drama that mines Hitchcock's morbid streak, usually covered by comedy, for all the squirming tension it's worth. The biggest exposure of his dark side before Vertigo.
This is a whimsy reading of "Crime and Punishment", where the idea resembles this plot: the thesis that superior men are allowed to murder inferior men because they're self-justificatory above the moral standards. In the end, we find that Brandon twists this words and his killing his done only by its self-proclaimed power and narcissistic vanity: "The power to kill can be just as satisfying as the power to create".