Henry David Thoreau (1817–1862) was an American author, naturalist, transcendentalist, tax resister, development critic, and philosopher.
Walking, or sometimes referred to as "The Wild", is a lecture by Henry David Thoreau first delivered at the Concord Lyceum on April 23, 1851.
 It was written between 1851 and 1860, but parts were extracted from his earlier journals.
 Thoreau read the piece a total of ten times, more than any other of his lectures.
 "Walking" was first published as an essay in the "Atlantic Monthly" after his death in 1862.
 He considered it one of his seminal works, so much so, that he once wrote of the lecture, "I regard this as a sort of introduction to all that I may write hereafter."
 Walking is a Transcendental essay in which Thoreau talks about the importance of nature to mankind, and how people cannot survive without nature, physically, mentally, and spiritually, yet we seem to be spending more and more time entrenched by society.
 For Thoreau walking is a self-reflective spiritual act that occurs only when you are away from society, that allows you to learn about who you are, and find other aspects of yourself that have been chipped away by society.
 "Walking" is an important canon in the transcendental movement that would lay the foundation for his best known work, "Walden".
 Along with Ralph Waldo Emerson's "Nature", and George Perkins Marsh's "Man and Nature", it has become one of the most important essays in the environmental movement.
The Night Thoreau Spent in Jail is a two-act American play by Robert E. Lee and Jerome Lawrence written in 1969.
 Hal B. Wallis is producer of the film based on the play, for which both Lawrence and Lee wrote the screenplay.
 The play is based on the early life of the title character, Henry David Thoreau, leading up to his night spent in a jail in Concord, Massachusetts.
 Thoreau was jailed for refusing to pay a poll tax on the grounds that the money might be used to pay for the Mexican-American War, which he opposed.
The Wheeler-Minot Farmhouse, also known as the Thoreau Farm or the Henry David Thoreau Birthplace, is an historic house at 341 Virginia Road in Concord, Massachusetts, United States.
 It is significant as the birthplace of writer Henry David Thoreau.
 The house was listed on the National Register of Historic Places in 2004.
 It currently serves as a museum and is open to the public.
The Stone Building, built in 1833, is an historic Greek Revival style building located at 735 Massachusetts Avenue in Lexington, Massachusetts.
 It was originally a meeting hall for East Lexington, which had its own civic identity and its own church, the neighboring Follen Community Church.
 Notable speakers at the hall included Ralph Waldo Emerson, Henry David Thoreau, Charles Sumner, Wendell Phillips, Theodore Parker, and Josiah Quincy, Jr. The building was offered to the trustees of the Cary Memorial Library for $2,000 in 1891, by Ellen Stone, granddaughter of Eli Robbins, who built it, and it was named for her.
 The East Lexington branch library which had been established in 1883, occupied it until the building was closed for repairs in 2007.
Henry David Thoreau (see name pronunciation; July 12, 1817 – May 6, 1862) was an American essayist, poet, philosopher, abolitionist, naturalist, tax resister, development critic, surveyor, and historian.
 A leading transcendentalist, Thoreau is best known for his book "Walden", a reflection upon simple living in natural surroundings, and his essay "Civil Disobedience" (originally published as "Resistance to Civil Government"), an argument for disobedience to an unjust state.
The Walden Woods Project (WWP) is a nonprofit organisation located in Lincoln, Massachusetts, devoted to the legacy of Henry David Thoreau and the preservation of Walden Woods.
 It was founded in 1990 by recording artist Don Henley to prevent two development projects in Walden Woods, the forest around Walden Pond that spans Lincoln and Concord, Massachusetts.
 Its mission has since expanded from conservation to research and education on the works of Henry David Thoreau.
 In 1998 the Thoreau Institute at Walden Woods was founded as part of the Project; today its library houses a collection of Thoreau-related resources.
The Thoreau Society is a literary society devoted to the works of Henry David Thoreau, it is based in Concord, Massachusetts, USA.
 Established in 1941, it has long contributed to the dissemination of knowledge about Henry David Thoreau by collecting books, manuscripts, and artifacts relating to Thoreau and his contemporaries, by encouraging the use of its collections, and by publishing articles in two Society periodicals.
Wendell Phillips Before the Concord Lyceum is an essay style letter-to-the-editor written by Henry David Thoreau and published in "The Liberator" in 1845 that praised the abolitionist lecturer "Wendell Phillips".
The Machine in the Garden: Technology and the Pastoral Ideal in America is a 1964 work of literary criticism written by Leo Marx and published by Oxford University Press.
 The title of the book refers to a trope in American literature representing the interruption of pastoral scenery by technology due to the industrialization of America during the 19th and 20th century.
 For example, the trope notably appears in Henry David Thoreau's "Walden" (1854) when the whistling sound of a steam locomotive disrupts the natural landscape of Walden Pond.
 Marx uses this literary metaphor to illustrate the relationship between culture and technology in the United States as depicted in the work of American authors such as Herman Melville, Ralph Waldo Emerson, Nathaniel Hawthorne, Henry David Thoreau, Mark Twain, Frank Norris, Henry Adams, Henry James, and F. Scott Fitzgerald.

Question: Wendell Phillips Before the Concord Lyceum, is an essay style letter-to-the-editor written by Henry David Thoreau, an essayist, poet, philosopher, abolitionist, naturalist, tax resister, development critic, surveyor, and historian, of which nationality? 
Answer: American