How was mral susaion used by abolitionists as an argument against slavery?

Moral persuasion was used by abolitionists to appeal to people's sense of ethics, morality, and religious beliefs to convince them that slavery was wrong. They argued that it was immoral to treat fellow human beings as property and that it went against the principles of equality and justice. By framing the issue in moral terms, abolitionists sought to sway public opinion and generate support for the abolition of slavery.