Committee for the Abolition of the Slave Trade

The Society for Effecting the Abolition of the Slave Trade (or The Society for the Abolition of the Slave Trade), was a British abolitionist group, formed on 22 May 1787, by twelve men who gathered together at a printing shop in London. The Society worked to educate the public about the abuses of the slave trade; it achieved abolition of the international slave trade in 1807, enforced by the Royal Navy. The United States also prohibited the African slave trade that year, to take effect in 1808.

It later was superseded by development of the Anti-Slavery Society in 1823, which worked to abolish the institution of slavery throughout the British colonies. Abolition was passed by parliament in 1833 (except in India, where it was part of the indigenous culture); with emancipation completed by 1838. The ASS continued to work for abolition of slavery in the United States and other nations.

The first anti-slavery statement was written by Dutch and German Quakers, who met at Germantown, Pennsylvania in 1688. English Quakers began to express their official disapproval of the slave trade in 1727 and promote reforms. From the 1750s, a number of Quakers in Britain's American colonies also began to oppose slavery, and called on English Quakers to take action with parliament. They encouraged their fellow citizens, including Quaker slave owners, to improve conditions for slaves, educate their slaves in Christianity, reading and writing, and gradually emancipate (free) them.

An informal group of six Quakers pioneered the British abolitionist movement in 1783 when the London Society of Friends' yearly meeting presented its petition against the slave trade to Parliament, signed by over 300 Quakers. They were also influenced by publicity that year about the Zong massacre, as the ship owners were litigating a claim for insurance against losses due to more than 132 slaves having been killed on their ship.

...
Wikipedia