Between 1860 and 1877 constitutional developments, to an extreme extent, and social developments, to a lesser extent, amounted to a revolution. During this time period many constitutional developments and battles over state vs. federal power made the changes that happened revolutionary.
Explanation:
From the start of the American Civil War until the end of Reconstruction, the United States of America endured what can be considered a revolution. During this time many constitutional and social developments brought about great change in the country. Some constitutional developments that caused conflict were the Emancipation Proclamation, three civil rights bills, and the reconstruction, while some social developments which could potentially lead to a revolution were the Freedmen's Bureau, the Black Codes, and the Ku Klux Klan. Together these events did put the country in a revolution.
Prior to 1860 the United States was already split into opposing sides fighting for power. Although these conflicts never reached the battlefield, the slaves states and free states were always competing for representation in congress. Each side wanted more states for them to get more representation. To prevent too much conflict, they decided on numerous compromises such as the Missouri Compromise and the Compromise of 1850.
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