Today there are few more controversial topics in the study of American history and government than the issue of slavery and the Constitution. On the surface, the Constitution seemed to protect slavery in the states, prohibited Congress from banning the slave trade for twenty years, and required that fugitive slaves, even in the North, be returned to their masters. Because of these apparent constitutional protections, a bloody Civil War was fought to free the slaves and win ratification of the Thirteenth Amendment to end slavery in the U.S. forever. The Constitution, therefore, in the eyes of some scholars, seems to be a contradiction to the universal ideals of liberty and equality in the American Founding and the Declaration of Independence which proclaimed “all men are created equal” and endowed with “Life, Liberty, and the pursuit of Happiness.”