The Tenth Amendment was added to the Bill of Rights to address concerns about the potential loss of rights by states to the federal government. It clarifies that powers not explicitly given to the federal government in the Constitution are reserved for the states or the people. This amendment helps maintain a balance of power between the federal government and the states, ensuring that states have the authority to govern within their own jurisdictions. The Tenth Amendment protects the rights and powers of states and reinforces the principle of federalism.