<human>:  How does the US Constitution ensure the rights of Americans?
<bot>: The US Constitution ensures the rights of Americans by protecting individuals from arbitrary government interference through the establishment of a system of checks and balances between the three branches of government (executive, legislative and judicial). Additionally, it contains the Bill of Rights, which outlines a catalog of individual rights that are protected by law, including such fundamental rights as freedom of speech and religion, the right to bear arms, the right to a fair trial, and the right to privacy.