Parker is known to history as a member of the Secret Six, an abolitionist group which supported John Brown.

In 1836, Springfield's American Colonization Society was its first radical abolitionist group.

Some pundits predicted that if popular sovereignty ever passed into law, abolitionist groups would launch open warfare- Open warfare.

Due to an electoral boycott by abolitionist groups and the questions regarding the validity of the Legislature itself, it never officially became law.

He toured the northern cities, petitioning abolitionist groups and politicians for the money necessary to buy his family's freedom.

By 1807 the abolitionist groups had a very sizable faction of like-minded members in the British Parliament.

In the 19th century, his speech was later reprinted by several abolitionist groups.

They did what they could to limit slavery and end it where possible, but were not part of any abolitionist group.

In the 1850s, stop-overs on the underground railroad were set up in the state and abolitionist groups were formed.

"Antislavery men", like John Quincy Adams, did what they could to limit slavery and end it where possible, but were not part of any abolitionist group.