Arguments for the ratification:
It'll make the country more united under a stronger central government.
Stronger central government means stronger economy and foreign relations.
The government will be able to execute and enforce laws better.
There will be a balance of powers under the bicameral legislature and checks and balances.
The new constitution will appoint an executive head of the country.
The government will be able to create a strong military without permission from the states.
The states will still be having their own government as long as they follow the national constitution.
Arguments against ratification:
The states won't be as powerful as they were under the Articles of Confederation.
The central government could become oppressive.
State representation was an issue.