1) Favoring slavery 
Proslavery ideology arose in the antebellum United States. It began as a reaction to the growing antislavery movement in the United States in the late 18th century and early 19th century. ==Abolitionism in The United States== Until the middle of the 18th century, slavery was practiced with little challenge anywhere in the world. For centuries phil...
• (n.) Advocacy of slavery. • (a.) Favoring slavery.
Pro·slav'er·y adjective [ Prefix pro- + slavery .] Favoring slavery. -- noun Advocacy of slavery. 
favoring slavery. · favoring the continuance of the institution of slavery of blacks, or opposed to interference with it.