I might add, while not defending slavery in anyway, that the current fashion is to act as if the British and only the British were involved in slavery, but Portugal, Spain and USA were also enthusiastic participators, who continued after we left off.
Not to mention the chiefs and kings whose tradition of enthusiastic slaving led to the start of the trade. I have just been reading a book about the British anti-slavery naval squadron, sent out when we abolished slavery, and who, for one hundred years patrolled the African coast, where the slaves came from and whose job was to try and capture slaving ships and free the slaves.
I was shocked to the core to find out how enthusiastically the local kings and chiefs, without any intimidation, were willing to round up people, or instigate wars on all kinds of pretexts, to gather slaves to sell to the slave traders, even though they knew what happened to these captives. and how these same African kings and chiefs actively colluded with the Portuguese and other slaving nations to keep the trade going after we banned it and sent a squadron to try and stop it.
This is the side of slaving, that is convenient and comfortable to forget.