Final answer:
Sergeant-Major Morris should not have sold the monkey's paw to Mr. White because he knew its consequences and yet still chose to pass on the curse.
Step-by-step explanation:
Interpreting the behavior of Sergeant-Major Morris regarding the monkey's paw is complex. Morris, despite knowing the paw's dangerous properties, still allowed Mr. White to possess it. This might suggest that Morris is either dismissive of the paw's actual power, bitterly resigned to the idea that others must learn of its dangers firsthand, or perhaps he is recklessly indifferent to the consequences that might befall others. His behavior reveals a conflicted nature; on one hand, he warns the Whites of the paw's malevolent capabilities, but on the other, he does nothing to prevent them from experiencing it themselves, thereby revealing a certain fatalism or detachment.