It sets limits in government action regarding a person's individual rights.
The documents that include personal liberties are the American bill of rights, the constitution, and the declaration of independence.
Individual civil liberties
A liberal position tries to protect an individuals civil liberties. Some civil liberties are freedom from slavery and freedom of religion.
American Civil Liberties Union's motto is 'Because Freedom Can't Protect Itself'.
Bill of Rights
restrictions on government action that are intended to protect political freedoms
It was good to protect the freedom of individuals.