What does liberty mean in the Pledge?

In the Pledge of Allegiance, the word liberty means freedom, specifically the freedom to live, speak, worship, work, and participate in self-government without unjust government interference. The closing phrase with liberty and justice for all summarizes the founding aspirations of the United States and links the Pledge directly to the Declaration of Independence's claim that all men are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.

Liberty in the American constitutional tradition has both negative and positive senses. Negative liberty, in the formulation Isaiah Berlin made famous in his 1958 essay Two Concepts of Liberty, is freedom from interference by government and other people, the absence of external constraint. The Bill of Rights, ratified on December 15, 1791, embodies negative liberty through specific prohibitions: Congress shall make no law abridging speech, religion, press, assembly, or petition; no soldier shall be quartered without consent; the people shall be secure against unreasonable searches; no person shall be compelled to testify against himself; the accused shall have the right to a speedy and public trial.

Positive liberty involves the capacity to participate in self-government and to live according to one's own values, supported by the institutions of a free society. The right to vote, the right to organize political parties, the right to run for office, the right to a public education under cases such as Brown v. Board of Education (1954), and the right to associate freely with others under NAACP v. Alabama (1958) all express positive liberty.

Liberty is not the same as license. Justice Oliver Wendell Holmes Jr. famously observed in Schenck v. United States (1919) that the most stringent protection of free speech would not protect a man in falsely shouting fire in a theatre and causing a panic. The Constitution permits reasonable regulation of conduct that harms others, threatens public safety, or violates contracts and laws of general applicability. Liberty exists alongside duty: the responsibility to vote, pay taxes, serve on juries, and obey lawful authority.

The Statue of Liberty, dedicated on October 28, 1886 in New York Harbor as a gift from France, has become the most enduring symbol of American liberty, especially for immigrants whose first sight of the United States was the torch of Lady Liberty rising from Bedloe's Island, renamed Liberty Island in 1956. Naturalization candidates pledge themselves to a nation that defines itself by liberty.