Final answer:
Mercy Otis Warren believed that the Constitution without a bill of rights would concentrate power, risking tyranny and oppression without individual protections.
Step-by-step explanation:
Mercy Otis Warren, a prominent Anti-Federalist, claimed that adopting the Constitution without a bill of rights would be like putting "shackles on our own neck" because it would centralize power without adequately protecting individual liberties.
Warren, along with other Anti-Federalists, feared that the strong national government proposed by the Constitution could lead to tyranny akin to British rule. They argued that without explicit protections, the government would have the potential to oppress the people and infringe on their rights. Consequently, the Anti-Federalists demanded a bill of rights to safeguard individual freedoms against governmental overreach.