It's from "Jerusalem" by William Blake.
Jerusalem - William Blake
And did those feet in ancient time
Walk upon England's mountains green?
And was the holy Lamb of God
On England's pleasant pastures seen?
And did the Countenance Divine
Shine forth upon our clouded hills?
And was Jerusalem...
Laws had to be passed to put the south back together. The slaves had been freed, but no provisions were made to educate or employ them. Farms and plantations were destroyed. The south was a physical and economic disaster. Families were separated. Law and order as well as serious plans to rebuild...