Answer:
If you're talking about the short story by Rebecca Makkai, the theme is that "is desperation can lead people to the extremes."
Step-by-step explanation:
The theme of “the briefcase” is the desperation can lead people to extremes. This is shown in the story when the protagonist's desperation leads him to steal the imprisoned professor's briefcase and ultimately adopt the professor's identity as his own
Hope it helps
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