Movie Suggestions

Films about slavery usually focus on the victims themselves, which is understandable.

Instead, I'm looking for movies (or TV series) which depict abolitionists at the time of widespread and normalised human slavery in society, and the rise of the abolitionist movement. That is, I want to see anti-slavery activists and how they eventually overtook society and transformed from a minority into the majority of people agreeing with them.

I'm interested in showing abolitionists in general but specifically in showing the growth of the abolitionism movement from being a vocal minority seemingly hated by most people, to the majority view in society. (Truly it would have to cover hundreds of years to show this complete, slow transition of society turning against slavery.)

I believe animal rights activists today might benefit from seeing the perspectives of people campaigning to end human slavery despite most of society being against them, and be inspired by how they eventually convinced everyone to reject slavery, as animal rights activists attempt to convince everyone to reject animal exploitation in modern day.