1788: A detailed cross-section of the slave ship Brooks was used by British abolitionists to visually demonstrate the horrific overcrowding of the Middle Pas…

1788: A detailed cross-section of the slave ship Brooks was used by British abolitionists to visually demonstrate the horrific overcrowding of the Middle Passage. The diagram showed 454 captives packed into the hold, though records indicated the vessel sometimes carried as many as 609 individuals. This image became a defining symbol of the movement, used to prove that the trade was built on systemic cruelty rather than incidental misfortune. Abolitionists distributed thousands of copies of the engraving across Britain and France to shock the public conscience and pressure lawmakers. The Brooks diagram remains one of the most effective and recognizable examples of historical propaganda used for social reform.