Abolition. It means doing away with something, generally an institution and in particular the institution of slavery. If you "abolish" (that's the verb) a practice, it means you never do it again, or permit others to.
the movement to end slavery
Abolition refers to the act of formally ending or eliminating a system, practice, or institution, particularly in the context of abolishing slavery or other forms of oppression. The term is most commonly associated with the movement to end slavery in the 19th century, but it can also apply to the abolition of laws, policies, or practices that are deemed unjust. In a broader sense, abolition advocates for the dismantling of systems that perpetuate inequality or harm.