Chiang

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Many worried that their choices were rendered meaningless because every action they took was counterbalanced by a branch in which they had made the opposite choice. Experts tried to explain that human decision-making was a classical rather than quantum phenomenon, so the act of making a choice didn't by itself cause new branches to split; it was quantum phenomena that generated new branches, and your choices in those branches were as meaningful as they ever were. Despite such efforts, many people became convinced that prisms nullified the moral weight of their actions. | 

Few acted so rashly as to commit murder or other felonies; the consequences of your actions still fell on you in this branch, not any other. But there was a shift in behavior that, while falling short of a mass outbreak of criminality, was readily discernible by social scientists. Edgar Allan Poe had used the phrase “the imp of the perverse” to describe the temptation to do the wrong thing simply because you could, and for many people the imp had become more persuasive.