Which group feared that the US Constitution would lead to an abuse of citizen rights?

The group that feared the US Constitution would lead to an abuse of citizen rights was the Anti-Federalists. They were deeply concerned that the new Constitution created a strong central government that could potentially infringe upon the individual rights and liberties of citizens. Their apprehensions were based on the belief that without explicit protections for individual rights, the government could overstep its bounds and become tyrannical, similar to what they experienced under British rule.

The Anti-Federalists advocated for the inclusion of a Bill of Rights, which ultimately addressed their concerns by guaranteeing specific freedoms and protections for citizens. This push resulted in the first ten amendments to the Constitution, ensuring fundamental liberties such as freedom of speech, religion, and the right to bear arms. Their commitment to safeguarding individual rights significantly influenced the constitutional development and the ongoing discourse about government power and personal freedoms in the United States.