Question: The George Perkins Marsh Boyhood Home, also known as the Marsh-Billings House, is the architectural centerpiece of Marsh-Billings-Rockefeller National Historical Park, in Woodstock, Vermont, United States,  The 550 acre estate on which it stands was given by Mary French Rockefeller (the granddaughter of Frederick Billings) and which American philanthropist, businessman, financier, and major conservationist?

Context articles: Charles Marsh Law Office
Mount Tom (Vermont)
George Perkins Marsh
History of ecology
Laurance Rockefeller
George Perkins Marsh Boyhood Home
Lucy Aldrich Rockefeller
Joseph Rucker Lamar Boyhood Home
Laura Rockefeller Chasin
Mary Billings French

The Charles Marsh Law Office is a historic building at 72 Hartland Hill Road (formerly Pleasant Street) in Woodstock, Vermont.
 Now a private residence, this moved and altered structure, built about 1797, is the oldest surviving example of a detached law office in the state.
 It was built for lawyer Charles Marsh, and is where his sons George Perkins Marsh and Lyndon Arnold Marsh trained for and/or practiced law.
 The building was listed on the National Register of Historic Places in 1994.
Mount Tom is a small peak, standing at 1357 feet, located in the town of Woodstock, Vermont.
 It is a part of the Marsh-Billings-Rockefeller National Historical Park.
 The peak has a multitude of hiking, running, and Nordic skiing trails, and has many sites dedicated to the national park.
 Standing in the middle of Woodstock, Vermont, the peak also is host to many annual town events, including the Road to the Pogue Race.
 Visible from the top are sights such as the village of Woodstock, the sister peak of Mount Tom (Mount Peg), the Ottauquechee River, Vermont Route 4A, and many neighboring mountains.
George Perkins Marsh (March 15, 1801 – July 23, 1882), an American diplomat and philologist, is considered by some to be America's first environmentalist and the precursor to the sustainability concept, although "conservationist" would be more accurate.
 The Marsh-Billings-Rockefeller National Historical Park in Vermont takes its name, in part, from Marsh.
Ecology is a new science and considered as an important branch of biological science, having only become prominent during the second half of the 20th century.
 Ecological thought is derivative of established currents in philosophy, particularly from ethics and politics.
 Its history stems all the way back to the 4th century.
 One of the first ecologists whose writings survive may have been Aristotle or perhaps his student, Theophrastus, both of whom had interest in many species of animals and plants.
 Theophrastus described interrelationships between animals and their environment as early as the 4th century BC.
 Ecology developed substantially in the 18th and 19th century.
 It began with Carl Linnaeus and his work with the economy of nature.
 Soon after came Alexander von Humboldt and his work with botanical geography.
 Alfred Russel Wallace and Karl Möbius then contributed with the notion of biocoenosis.
 Eugenius Warming’s work with ecological plant geography led to the founding of ecology as a discipline.
 Charles Darwin’s work also contributed to the science of ecology, and Darwin is often attributed with progressing the discipline more than anyone else in its young history.
 Ecological thought expanded even more in the early 20th century.
 Major contributions included: Eduard Suess’ and Vladimir Vernadsky’s work with the biosphere, Arthur Tansley’s ecosystem, Charles Elton's "Animal Ecology", and Henry Cowles ecological succession.
 Ecology influenced the social sciences and humanities.
 Human ecology began in the early 20th century and it recognized humans as an ecological factor.
 Later James Lovelock advanced views on earth as a macro-organism with the Gaia hypothesis.
 Conservation stemmed from the science of ecology.
 Important figures and movements include Shelford and the ESA, National Environmental Policy act, George Perkins Marsh, Theodore Roosevelt, Stephen A. Forbes, and post-Dust Bowl conservation.
 Later in the 20th century world governments collaborated on man’s effects on the biosphere and Earth’s environment.
Laurance Spelman Rockefeller (May 26, 1910 – July 11, 2004) was an American philanthropist, businessman, financier, and major conservationist.
 He was a prominent third-generation member of the Rockefeller family, being the fourth child of John Davison Rockefeller Jr. and Abigail Greene "Abby" Aldrich.
 His siblings were Abby, John III, Nelson, Winthrop, and David.
The George Perkins Marsh Boyhood Home, also known as the Marsh-Billings House, is the architectural centerpiece of Marsh-Billings-Rockefeller National Historical Park, located on Vermont Route 12 in Woodstock, Vermont, United States.
 The house, built in 1805 and enlarged several times, is historically significant as the boyhood home of George Perkins Marsh (1801–82), an early conservationist, and as the home later in the 19th century of Frederick H. Billings (1823–90), a businessman and philanthropist who was a cofounder of the Northern Pacific Railroad.
 It is also architecturally significant as a high-quality example of Queen Anne architecture, alterations and enlargements commissioned by Billings and designed by Henry Hudson Holley.
 The house and its surrounding gardens were declared a National Historic Landmark in 1967.
 The 550 acre estate on which it stands was given by Mary French Rockefeller (the granddaughter of Frederick Billings) and Laurance Rockefeller to the people of the United States in 1992.
Lucy Aldrich Rockefeller Waletzky (born 1941) is an American philanthropist and environmentalist.
 She is the daughter of Laurance Spelman Rockefeller (1910–2004) and Mary French (1910–1997), and a fourth generation member of the Rockefeller family.
 Waletzky served on the board of the Friends of the Rockefeller State Park Preserve from 1997 to 2006.
 She received the Governor's Parks and Preservation Award in 2004.
Joseph Rucker Lamar Boyhood Home is the boyhood home of Joseph Rucker Lamar in Augusta, Georgia.
 Lamar served as Justice of the United States Supreme Court.
 The home was added to the National Register of Historic Places on June 13, 1996.
 It is located at 415 7th Street.
 The house was constructed in 1860.
 It is located in the Augusta Downtown Historic District, is the headquarters of Historic Augusta, and is used as a visitors center for the Boyhood Home of Woodrow Wilson.
Laura Spelman Rockefeller (October 11, 1936 – November 17, 2015) was an American philanthropist.
 She was the eldest child of Laurance Spelman Rockefeller (1910–2004) and Mary French (1910–1997), and a fourth generation member of the Rockefeller family.
 She has two younger sisters, Marion, Lucy Aldrich Rockefeller, and a younger brother, Laurance Spelman Rockefeller Jr..
 Her patrilineal great-grandfather was Standard Oil's co-founder John D. Rockefeller and her matrilineal great-grandfather was Frederick H. Billings, a president of Northern Pacific Railway.
 Both of her grandmothers, Mary Billings French and Abby Aldrich Rockefeller, were important to the early development of YWCA USA.
 Chasin is known as the founder, former executive director, and former board member of the Public Conversations Project in Watertown, Massachusetts.
Mary Montagu Billings French (March 6, 1869 – 1951) was an American heiress and society figure, as well as YWCA president and board member.
 She was the daughter of Frederick Billings and inherited the Marsh-Billings-Rockefeller National Historical Park from him before she died.
 She passed it on to her daughter, Mary French Rockefeller.