Historians have long recognized the unprecedented expansion of federal power during the Civil War. Moreover most scholars agree that the expansion of federal power manifested itself most immediately and profoundly in the abolition of slavery. In a sense, through the Emancipation Proclamation, the Republican administration injected the national government into the domain of civil rights, and by doing so imbued federal power with a distinct moral purpose. The passage of the Thirteenth, Fourteenth, and Fifteenth Amendments codified this expression of federal authority, rejecting the bedrock tenet in American republican thought that centralized power constituted the primary threat to individual liberty.
From Selma, Alabama, to Derry, Northern Ireland: Media Images and their Influence on Civil Rights Demonstrations