What was the greatest accomplishment of the abolitionist by 1840?

The greatest accomplishment of the abolitionists by 1840 was that they had managed to bring the issue of slavery into the public consciousness. Consequently, the issue gained tract as a prominent topic of conversation and brought into light the injustices of the institution.

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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the enslaved people onboard suffered from illness with some frequency