Why did the 18th century Americans oppose or fear a strong central government?

The 18th century Americans feared a strong central government which was envisioned in U.S constitution of 1787 because they feared the authority of one national government and the dominance of upper class.

Explanation:

The anti-federalist, agitated for the bill of rights to be added to the constitution. The 18th century Americans feared the loss of their control over local issues, they believed there will be inadequate separation of powers when the central government is made strong.

For instance, The anti federalist in North Carolina prevented the ratification of the constitution until the new government is established, the bill of rights was later added to the constitution.