Answer:
Based on these definitions I searched, I would go with aspersion since the guy's reputation would fall.
Explanation:
aspersion: an attack on the reputation or integrity of someone or something.
abnegation: the act of renouncing or rejecting something.
approbation: approval or praise.
aberration: a departure from what is normal, usual, or expected, typically one that is unwelcome.
arrogation: to claim or seize without justification
Older or ancient, especially relating to the geological past. (Hope that answers your question :))
Pretty sure answer is, “Though they lived during the same time period, Dickinson wrote compact poems about ordinary events, while Whitman wrote longer poems about public life and well-known events”