What event led to the abolitionist movement prior to the civil war

In 1807 the Slave Trade Act abolished the transport of slaves from Africa and the work of religiously inspired abolitionists such as the Quakers and Baptist parliamentarian William Wilberforce led to the abolition of slavery throughout the British Empire in 1833.

Explanation:

the speech convinced americans that the ussr was an enemy, rather than an ally, which led to the creation of the truman doctrine.