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The purpose of using epicycles and deferents to explain the motion of the planets in the night sky was to account for
Frederick Douglass
An African-American social reformer, abolitionist, orator, writer, and statesman, who escaped from slavery in Maryland.
William Lloyd Garrison
An American abolitionist, journalist, and social reformer best known for his editorship of the anti-slavery newspaper "The Liberator".
Gag Rule
Any rule that prohibits public discussion of a particular topic, famously applied in the U.S. Congress to prevent debate on anti-slavery petitions from 1836 to 1844.
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