Although the Three-Fifths Compromise helped Northern and Southern states reach an agreement that allowed for ratification of the Constitution, in the long run it had a negative effect on the nation because

Verified Answer :

This is because it gave more opportunities for the slave
states.  Though Blacks were part of the
equation, they were not really given rights because they were slaves and were
considered property.  The use of the
numbers would justify the representation of a state through the inclusion of
slaves.  Later on, this debate would lead
to conflict between states during the Civil War.