The answer to that is pro aparthied government.
A. solve the slavery issue.
The Constitution did not provide a clear solution to slavery. Nearly all of the founding fathers were against slavery, yet still owned slaves. They realized the economic and societal influence of slavery was too great. Founders such as John Adams, Alexander Hamilton, and Benjamin Franklin sought for the abolition of Slavery, but were overridden by the opposition.
The word Slavery was never mentioned in the Constitution to avoid controversy.
It depends what system you are talking about
A federal government and a confederate government differ in where the majority of the power lies. In a federal government the central government holds the most power and states have less. In a confederate government the states hold the majority of the power. The Confederate States of America acted as sovereign states with each state having little influence from a more powerful central government.