This is an interesting historical document - it's using Sisterhood to forward the abolitionist cause. Not surprising in the North, since abolition was taken up by many churches and church work was one of the few acceptable public spheres in which women could participate. And, of course, Uncle Tom's Cabin was written by a woman, Harriet Beecher Stowe.
Seems as long as you were female, The Man was keeping you down, regardless of color.
I've listed some books you might be interested in below.
I also want to read Gary Gallagher's book on how Hollywood has shaped our perceptions of the Civil War. Because, maybe it's just me, but I think of images from Gone With The Wind before I think of those black & white photos of the war dead. (Which on the one hand is a good thing, because those photographs are very gruesome.)
So there ya go. Some things to think about.