Why was the confederation congress too weak?

The purpose of the Articles of Confederation was to create a confederation of states whereby each state retained "its sovereignty, freedom, and independence, and every power, jurisdiction, and right...not...expressly delegated to the United States in Congress assembled."  

Every state was as independent as possible within the central government of the United States, which was only responsible for the common defense, the security of liberties, and the general welfare. Congress could make treaties with foreign nations, declare war, maintain an army and navy, establish a postal service, manage Indigenous affairs, and coin money. But Congress could not levy taxes or regulate commerce.

Because of widespread fear of a strong central government at the time they were written and strong loyalties among Americans to their own state as opposed to any national government during the American Revolution, the Articles of Confederation purposely kept the national government as weak as possible and the states as independent as possible. However, this led to many of the problems that became apparent once the Articles took effect.

Explanation:

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the revolution instituted a short-lived roman republic.

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