Answer:
That gradually, but very slowly, white people had to morally come clear with slavery and abuse of female slaves.
Step-by-step explanation:
Celia is the haunting story of a young black girl (14 years old!) who is abused by her white owner in Missouri . During 5 long years she put up with it but then decided to murder him. In the trial she was vigorously defended by state-appointed attorneys, who built their case on a state law allowing women the use of deadly force in such cases.
Of course it didn't help her, she was hanged because the white social order was not to be altered legally. But it did made many white people conscious about their inmoral decisions in respect to slaves. So it did set a moral precedent.