Why did the first congress add a bill of rights to the constitution?

The correct answer to this open question is the following.

The first Congress add a Bill of Rights to the constitution to outline the rights of individuals.

During the Constitutional Convention, federalists and anti-federalists debated on their respective arguments. The federalists -led by Alexander Hamilton- favored a strong central government. The antifederalists -led by Thomas Jefferson- did not agree on the idea of having a strong central government that limited the sovereignty of the states, considering that a risk of a government becoming a tyrant. Antifederalists considered that a Bill of Rights that protected the citizen was necessary to limit the power of the government. That is when James Madison drafted the Bill of Rights.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

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