The American Library Association (ALA) is the largest professional library association in the world. This body provides professional development opportunities for library workers, advocates for libraries at the federal level, accredits master’s programs in library and information studies (the terminal degree for librarians), and sets guidelines and standards for the profession.
One of ALA’s foundational documents is the Library Bill of Rights (https://www.ala.org/advocacy/intfreedom/librarybill). This document identifies seven guiding principles for library collections and services [bolded emphasis is my own]:
Library workers have a professional and ethical obligation to uphold the principles outlined in the Library Bill of Rights. ALA’s Intellectual Freedom Committee has published multiple interpretations of the Library Bill of Rights to address specific challenges to its tenets, including: