In 1787, the Society for Effecting the Abolition of the Slave Trade was formed in London and William Wilberforce led the cause of abolition through a parliamentary campaign.
Approximately 132 African captives were thrown overboard and drowned because if they had died on board, the crew could not claim insurance money on the lost cargo.
The case of the Zong came to symbolise the horrors of the Middle Passage as it was heavily publicised in the newspapers and strengthened the abolition campaign.