Hi Thief, thank you for your response. You may have yet to capture the nuances of my words. Yes, the British set out to abolish slavery, but they did not do it purely for altruistic reasons. Slavery at that point had become economically unsustainable. The British plantation owners could no longer compete with the more extensive, industrialised plantations. Yes, some people in the United Kingdom wanted slavery abolished because of its inhumanity. The harmful legacy of the Trans-Atlantic slave trade still exists today.
Further, in contemporary development in the United States, the selected editing of history shows that we still must learn from slavery. Your argument that slavery existed worldwide does not justify or excuse the Atlantic Slave Trade. The Trans-Atlantic slave trade was different because this was the first time this was done on such an industrial scale, and racial inferiority was used to justify its existence.
I can recommend a few books you can reference: Williams, E., 1994, Capitalism and Slavery, Elkins. C., Legacy of Violence, A History of the British Empire, 2022, Bodley Head, London. Parker, M., 2011, The Sugar Barons, Hutchinson, London. Also, I recommend scrolling through the materials from the British Colonial Empire at the National Archives at Kews. For insurance, economic and political reasons, the British kept meticulous records of their everyday activities and monitoring of the colonies.