Why was abolitionism a major issue in the US?

Abolitionism was a major issue in the U.S. because it challenged the deeply entrenched institution of slavery, which was integral to the economy and social structure, particularly in the Southern states. The movement sought to end the moral and ethical injustices of slavery, galvanizing public opinion and sparking intense debates about human rights and equality. It became a focal point of political conflict, contributing to sectional tensions that ultimately led to the Civil War. The struggle for abolition also highlighted broader themes of liberty, justice, and the role of government in regulating personal freedoms.