They mastered the use of images and logos:
The use of the engraving of the Liverpool slave ship, the Brookes,
became the defining image of the battle to end the slave trade. A cross
section of the ship showing 482 slaves lying shoulder to shoulder, made
“an instantaneous impression of horror on all who saw it”, according to
Clarkson. The committee’s publication of the Brookes diagram was
a great PR coup.

Quakers pioneered and championed the consumer
boycott:
They targeted Caribbean sugar.
They took radical positions:
Some of the most radical anti-slavery voices were Quakers - such as
Elizabeth Heyrick, who argued, exceptionally, that when the slaves were
freed it was they and not their owners who should be compensated. |