Answer: ife, liberty, and the equality of all citizens were all included in the Declaration of Independence. Slavery, according to others, should be abolished as a result of this. Slavery was banned in the Northwest Territory. In view of the southern states' economic need for slavery, the Declaration of Independence posed concerns about how to fulfill the values of American democracy. If this was the case, slavery would have to be abolished. Slavery had to be abolished if that was the case. Slaves should not be considered even three-fifths of an individual for representation in Congress if they were land.