Question: What famous document of the United States reflects the contributions to classical republicanism and liberal theory of the author of A Letter Concerning Toleration?

Context paragraphs:
Maryland Toleration Act: The Maryland Toleration Act, also known as the Act Concerning Religion, was a law mandating religious tolerance for Trinitarian Christians.  It was passed on April 21, 1649, by the assembly of the Maryland colony, in St. Mary's City.  It was the second law requiring religious tolerance in the British North American colonies and created one of the pioneer statutes passed by the legislative body of an organized colonial government to guarantee any degree of religious liberty.  Specifically, the bill, now usually referred to as the Toleration Act, granted freedom of conscience to all Christians.  (The colony which became Rhode Island passed a series of laws, the first in 1636, which prohibited religious persecution including against non-Trinitarians; Rhode Island was also the first government to separate church and state.)  Historians argue that it helped inspire later legal protections for freedom of religion in the United States.  The Calvert family, who founded Maryland partly as a refuge for English Catholics, sought enactment of the law to protect Catholic settlers and those of other religions that did not conform to the dominant Anglicanism of Britain and her colonies.

John Locke: John Locke {'1': ", '2': ", '3': ", '4': "} ( ; 29 August 1632 – 28 October 1704) was an English philosopher and physician, widely regarded as one of the most influential of Enlightenment thinkers and commonly known as the "Father of Liberalism".  Considered one of the first of the British empiricists, following the tradition of Sir Francis Bacon, he is equally important to social contract theory.  His work greatly affected the development of epistemology and political philosophy.  His writings influenced Voltaire and Jean-Jacques Rousseau, many Scottish Enlightenment thinkers, as well as the American revolutionaries.  His contributions to classical republicanism and liberal theory are reflected in the United States Declaration of Independence.

Cuisine of the United States: The cuisine of the United States reflects its history.  The European colonization of the Americas yielded the introduction of a number of ingredients and cooking styles to the latter.  The various styles continued expanding well into the 19th and 20th centuries, proportional to the influx of immigrants from many different nations; such influx developed a rich diversity in food preparation throughout the country.

William Popple: William Popple (1638–1708) was an English Unitarian merchant, the translator of John Locke's "A Letter Concerning Toleration".

Jonas Proast: Jonas Proast (c.1640−1710) was an English High Church Anglican clergyman and academic.  He was an opponent of latitudinarianism, associated with Henry Dodwell, George Hickes, Thomas Hearne and Jonathan Edwards.  He is now known for his controversy with John Locke, over Locke's "Letter concerning Toleration".

Art education in the United States: Art education in the United States reflects the social values of American culture.  Apprenticeship was once the norm and the main sense, however with the democratization of education, particularly as promoted by educational philosopher John Dewey, opportunities have greatly expanded.  Elliot Eisner has been an influential advocate for the benefits of art in the schools.

A Letter Concerning Toleration: A Letter Concerning Toleration by John Locke was originally published in 1689.  Its initial publication was in Latin, though it was immediately translated into other languages.  Locke's work appeared amidst a fear that Catholicism might be taking over England, and responds to the problem of religion and government by proposing religious toleration as the answer.  This "letter" is addressed to an anonymous "Honored Sir": this was actually Locke's close friend Philipp van Limborch, who published it without Locke's knowledge.

Music of the United States: The music of the United States reflects the country's multi-ethnic population through a diverse array of styles.  It is a mixture of music influenced by West African, Irish, Scottish and mainland European among others.  The country's most internationally renowned genres are jazz, blues, country, bluegrass, rock, rhythm and blues, soul, ragtime, hip hop, barbershop, pop, experimental, techno, house, dance, boogaloo, salsa, and rock and roll.  The United States has the world's largest music market with a total retail value of 4,898.3 million dollars in 2014, and its music is heard around the world.  Since the beginning of the 20th century, some forms of American popular music have gained a near global audience.

Post-law school employment in the United States: Post-law school employment in the United States reflects the extent to which students who obtain a law degree after attending law school in the United States are able to find employment which pays well enough to enable them to at least recoup the costs of their degrees.

History of conservatism in the United States: In the United States there has never been a national political party called the Conservative Party.  All major American political parties support republicanism and the basic classical liberal ideals on which the country was founded in 1776, emphasizing liberty, the pursuit of happiness, the rule of law, the consent of the governed, opposition to aristocracy, and fear of corruption, coupled with equal rights.  Political divisions inside the United States often seemed minor or trivial to Europeans, where the divide between the Left and the Right led to violent polarization, starting with the French Revolution.

Supporting paragraphs: A Letter Concerning Toleration John Locke
Answer: Declaration of Independence