This darkest-before-the-dawn pattern is a recurrent theme in American history, as some of our worst periods in history have directly preceded some of our biggest progressive change moments. The decade before the abolition of slavery and three of the most profoundly progressive amendments to the U.S. Constitution saw the passage of the Fugitive Slave Act, the Kansas-Nebraska Act, and the Dred Scott decision, three of the most dreadful, slavery-promoting actions our government had ever taken.