The abolitionist movement in the 1850s is best described as

the goal of the abolitionist movement was the immediate emancipation of all slaves and the end of racial discrimination and segregation. Advocating for immediate emancipation distinguished abolitionists from more moderate anti-slavery advocates who argued for gradual emancipation, and from free-soil activists who sought to restrict slavery to existing areas and prevent its spread further west. Radical abolitionism was partly fueled by the religious fervor of the Second Great Awakening, which prompted many people to advocate for emancipation on religious grounds. Abolitionist ideas became increasingly prominent in Northern churches and politics beginning in the 1830s, which contributed to the regional animosity between North and South leading up to the Civil War.

The answer is radical.