Write a short persuasive essay in which you theorize what the single greatest social development was in the United States from the establishment of the Republic in 1788 to the eve of the Civil War in 1860.

The Civil War had a greater impact on American society and the polity than any other event in the country's history. The number of casualties suffered in a single day at the battle of Antietam on Lincoln and other Republicans recognized that the United States Constitution protected ...

answer; i believe its (cpr);