Sir Charles Galton Darwin (19 December 1887 – 31 December 1962) was an English physicist who served as director of the National Physical Laboratory (NPL) during the

Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

. He was a son of the mathematician

George Darwin Sir George Howard Darwin (9 July 1845 – 7 December 1912) was an English barrister and astronomer, the second son and fifth child of Charles Darwin and Emma Darwin. He is known for the harmonic analysis of the theory of tides. The Darwin s ...

and a grandson of

Charles Darwin Charles Robert Darwin ( ; 12 February 1809 – 19 April 1882) was an English Natural history#Before 1900, naturalist, geologist, and biologist, widely known for his contributions to evolutionary biology. His proposition that all speci ...

Early life

Darwin was born at Newnham Grange in

Cambridge Cambridge ( ) is a List of cities in the United Kingdom, city and non-metropolitan district in the county of Cambridgeshire, England. It is the county town of Cambridgeshire and is located on the River Cam, north of London. As of the 2021 Unit ...

, England into a scientific dynasty. He was a son of mathematician Sir

and a grandson of

. His mother was Lady Darwin, Maud du Puy of

Philadelphia, Pennsylvania Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the Unit ...

. Darwin's elder sister was the artist

Gwen Raverat Gwendolen Mary "Gwen" Raverat (née Darwin; 26 August 1885 – 11 February 1957), was an English wood engraver who was a founder member of the Society of Wood Engravers. Her memoir ''Period Piece'' was published in 1952. Biography Gwendolen Ma ...

, and his younger sister Margaret married

Geoffrey Keynes Sir Geoffrey Langdon Keynes ( ; 25 March 1887, Cambridge – 5 July 1982, Cambridge) was a British surgeon and author. He began his career as a physician in World War I, before becoming a doctor at St Bartholomew's Hospital in London, where he ...

, the brother of the economist

John Maynard Keynes John Maynard Keynes, 1st Baron Keynes ( ; 5 June 1883 – 21 April 1946), was an English economist and philosopher whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments. Originall ...

. His younger brother William Robert Darwin was a London stockbroker. Darwin was educated at

Marlborough College Marlborough College is a Public school (United Kingdom), public school (English private boarding school) for pupils aged 13 to 18 in Marlborough, Wiltshire, England. It was founded as Marlborough School in 1843 by the Dean of Manchester, George ...

(1901–1906) and then studied mathematics at

Trinity College, Cambridge Trinity College is a Colleges of the University of Cambridge, constituent college of the University of Cambridge. Founded in 1546 by King Henry VIII, Trinity is one of the largest Cambridge colleges, with the largest financial endowment of any ...

, graduating BA in 1910, later promoted to MA by seniority.

Career

He secured a post-graduate position at the

Victoria University of Manchester The Victoria University of Manchester, usually referred to as simply the University of Manchester, was a university in Manchester, England. It was founded in 1851 as Owens College. In 1880, the college joined the federal Victoria University. A ...

, working under

Ernest Rutherford Ernest Rutherford, 1st Baron Rutherford of Nelson (30 August 1871 – 19 October 1937) was a New Zealand physicist who was a pioneering researcher in both Atomic physics, atomic and nuclear physics. He has been described as "the father of nu ...

and

Niels Bohr Niels Henrik David Bohr (, ; ; 7 October 1885 – 18 November 1962) was a Danish theoretical physicist who made foundational contributions to understanding atomic structure and old quantum theory, quantum theory, for which he received the No ...

on Rutherford's

atom Atoms are the basic particles of the chemical elements. An atom consists of a atomic nucleus, nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons. The chemical elements are distinguished fr ...

ic theory. On 4 April 1911 he was elected to the membership of

Manchester Literary and Philosophical Society The Manchester Literary and Philosophical Society, popularly known as the Lit. & Phil., is one of the oldest learned societies in the United Kingdom and second oldest provincial learned society (after the Spalding Gentlemen's Society). Promi ...

while a, Reader in Mathematical Physics. In 1912, his interests developed into using his mathematical skills assisting

Henry Moseley Henry Gwyn Jeffreys Moseley (; 23 November 1887 – 10 August 1915) was an English physicist, whose contribution to the science of physics was the justification from physical laws of the previous empirical and chemical concept of the atomic numb ...

X-ray An X-ray (also known in many languages as Röntgen radiation) is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays. Roughly, X-rays have a wavelength ran ...

diffraction Diffraction is the deviation of waves from straight-line propagation without any change in their energy due to an obstacle or through an aperture. The diffracting object or aperture effectively becomes a secondary source of the Wave propagation ...

. His two 1914 papers on the

dynamical theory of diffraction The dynamical theory of diffraction describes the interaction of waves with a regular lattice. The wave fields traditionally described are X-rays, neutrons or electrons and the regular lattice are atomic crystal structures or nanometer-scale mul ...

of X-rays from perfect crystals became often cited classics, minting the Darwin Curve of reflectivity. In a further paper of 1922, he introduced the mosaic crystal model. On the outbreak of

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

, he was commissioned and sent to France as a censor. A year later

William Lawrence Bragg Sir William Lawrence Bragg (31 March 1890 – 1 July 1971) was an Australian-born British physicist who shared the 1915 Nobel Prize in Physics with his father William Henry Bragg "for their services in the analysis of crystal structure by ...

had him transferred to the

Royal Engineers The Corps of Royal Engineers, usually called the Royal Engineers (RE), and commonly known as the ''Sappers'', is the engineering arm of the British Army. It provides military engineering and other technical support to the British Armed Forces ...

to participate in the work on the localisation of enemy artillery by sound ranging. When that research was on a solid footing, he was transferred to the RAF to study aircraft noise. He was awarded the

Military Cross The Military Cross (MC) is the third-level (second-level until 1993) military decoration awarded to officers and (since 1993) Other ranks (UK), other ranks of the British Armed Forces, and formerly awarded to officers of other Commonwealth of ...

in 1918. From 1919 to 1922 he was a lecturer and fellow of

Christ's College, Cambridge Christ's College is a Colleges of the University of Cambridge, constituent college of the University of Cambridge, England. The college includes the Master, the Fellows of the College, and about 450 undergraduate and 250 graduate students. The c ...

, where he worked with R.H. Fowler on

statistical mechanics In physics, statistical mechanics is a mathematical framework that applies statistical methods and probability theory to large assemblies of microscopic entities. Sometimes called statistical physics or statistical thermodynamics, its applicati ...

and, what came to be known as, the Darwin–Fowler method. He then worked for a year at the

California Institute of Technology The California Institute of Technology (branded as Caltech) is a private research university in Pasadena, California, United States. The university is responsible for many modern scientific advancements and is among a small group of institutes ...

before becoming the first Tait Professor of

Natural Philosophy Natural philosophy or philosophy of nature (from Latin ''philosophia naturalis'') is the philosophical study of physics, that is, nature and the physical universe, while ignoring any supernatural influence. It was dominant before the develop ...

at the

University of Edinburgh The University of Edinburgh (, ; abbreviated as ''Edin.'' in Post-nominal letters, post-nominals) is a Public university, public research university based in Edinburgh, Scotland. Founded by the City of Edinburgh Council, town council under th ...

in 1924, working on

quantum optics Quantum optics is a branch of atomic, molecular, and optical physics and quantum chemistry that studies the behavior of photons (individual quanta of light). It includes the study of the particle-like properties of photons and their interaction ...

and magneto-optic effects. He was the first in 1928, to calculate the

fine structure In atomic physics, the fine structure describes the splitting of the spectral lines of atoms due to electron spin and relativistic corrections to the non-relativistic Schrödinger equation. It was first measured precisely for the hydrogen atom ...

of the hydrogen atom under

Paul Dirac Paul Adrien Maurice Dirac ( ; 8 August 1902 – 20 October 1984) was an English mathematician and Theoretical physics, theoretical physicist who is considered to be one of the founders of quantum mechanics. Dirac laid the foundations for bot ...

's relativistic theory of the

electron The electron (, or in nuclear reactions) is a subatomic particle with a negative one elementary charge, elementary electric charge. It is a fundamental particle that comprises the ordinary matter that makes up the universe, along with up qua ...

. He was assisted at the university by Dr

Robert Schlapp Robert Schlapp FRSE (18 July 1899 – 31 May 1991) was a 20th-century British physicist and mathematician of German descent. He was affectionately known as Robin Schlapp. Life He was born in Edinburgh on 18 July 1899, the youngest of three ch ...

. In 1936 Darwin asked fellow physicist

Max Born Max Born (; 11 December 1882 – 5 January 1970) was a German-British theoretical physicist who was instrumental in the development of quantum mechanics. He also made contributions to solid-state physics and optics, and supervised the work of a ...

if he would consider becoming his successor as Tait Professor, an offer that Born promptly accepted. He then resigned his post in Edinburgh to become Master of Christ's College, beginning his career as an active and able administrator, becoming director of the National Physical Laboratory on the approach of war in 1938. He served in the role into the post-war period, unafraid to seek improved laboratory performance through re-organisation, but spending much of the war years working on the

Manhattan Project The Manhattan Project was a research and development program undertaken during World War II to produce the first nuclear weapons. It was led by the United States in collaboration with the United Kingdom and Canada. From 1942 to 1946, the ...

co-ordinating the American, British, and Canadian efforts. Darwin was appointed

KBE KBE may refer to: * Knight Commander of the Most Excellent Order of the British Empire, post-nominal letters * Knowledge-based engineering Knowledge-based engineering (KBE) is the application of knowledge-based systems technology to the domain o ...

in 1942. In 1952, he was elected to the

American Philosophical Society The American Philosophical Society (APS) is an American scholarly organization and learned society founded in 1743 in Philadelphia that promotes knowledge in the humanities and natural sciences through research, professional meetings, publicat ...

Private life

In 1925, he married Katharine Pember, a mathematician and daughter of

Francis William Pember Francis William Pember (16 August 1862 — 19 January 1954) was an English first-class cricketer, lawyer and an academic at the University of Oxford. Having been played first-class cricket for Hampshire County Cricket Club, Hampshire and the Ma ...

. They had four sons and a daughter: * Cecily Darwin (1926–2022) became an X-ray crystallographer and in 1951 married John Littleton of Philadelphia. * George Pember Darwin (1928–2001) worked developing computers, and then (1964) married Angela Huxley, daughter of David Bruce Huxley. She was also a granddaughter of the writer Leonard Huxley and a great-granddaughter of

Thomas Huxley Thomas Henry Huxley (4 May 1825 – 29 June 1895) was an English biologist and anthropologist who specialized in comparative anatomy. He has become known as "Darwin's Bulldog" for his advocacy of Charles Darwin's theory of evolution. The stor ...

, "Darwin's Bulldog". * Henry Galton Darwin (1929–1992) was with the British

Foreign Office Foreign may refer to: Government * Foreign policy, how a country interacts with other countries * Ministry of Foreign Affairs, in many countries ** Foreign Office, a department of the UK government ** Foreign office and foreign minister * United ...

, and married Jane Christie. * Francis William Darwin (1932–1999) was a

zoologist Zoology ( , ) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one ...

and taught at the

University of London The University of London (UoL; abbreviated as Lond or more rarely Londin in Post-nominal letters, post-nominals) is a collegiate university, federal Public university, public research university located in London, England, United Kingdom. The ...

, and married in 1976. * Edward Leonard Darwin (1934–2020) became a civil engineer. In his spare time, Darwin also served as a wartime vice-president of the

Simplified Spelling Society The English Spelling Society is an international organisation, based in the United Kingdom. It was founded in 1908 as the Simplified Spelling Society. It primarily aims to raise awareness of problems caused by English orthography, English spelling ...

. On his retirement, his attention turned to issues of population,

genetics Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinians, Augustinian ...

and

eugenics Eugenics is a set of largely discredited beliefs and practices that aim to improve the genetic quality of a human population. Historically, eugenicists have attempted to alter the frequency of various human phenotypes by inhibiting the fer ...

. His conclusions were

pessimistic Pessimism is a mental attitude in which an undesirable outcome is anticipated from a given situation. Pessimists tend to focus on the negatives of life in general. A common question asked to test for pessimism is "Is the glass half empty or half ...

and entailed a resigned belief in an inevitable

Malthusian catastrophe Malthusianism is a theory that population growth is potentially exponential, according to the Malthusian growth model, while the growth of the food supply or other resources is linear, which eventually reduces living standards to the point of tr ...

, as described in his 1952 book ''The Next Million Years''. He first argued in this book that voluntary birth control (family planning) establishes a selective system that ensures its own failure. The cause is that people with the strongest instinct for wanting children will have the largest families and they will hand on the instinct to their children, while those with weaker instincts will have smaller families and will hand on that instinct to their children. In the long run society will consist mainly of people with the strongest instinct to reproduce. This would ultimately have dysgenic effects.Carl Jay Bajema (ed) ''Eugenics. Then and Now'', Dowden, Hutchinson, & Ross Inc. , 1976, p. 294–298. In later years he travelled widely, an enthusiastic collaborator across national borders and an able communicator of scientific ideas. He died at Newnham Grange in Cambridge (the house where he was born) on New Year's Eve 1962/3; he was cremated at Cambridge Crematorium on 4 January 1963. He and his late wife are commemorated with a memorial at

St Botolph's Church, Cambridge St Botolph's Church, Cambridge is a Church of England parish church in the city of Cambridge, England. The church is a Grade I listed building. History The church is dedicated to Botolph, a seventh-century abbot in East Anglia, who is a patron s ...

; she was cremated, the funeral was in Wimbledon, where she had been living.

Publications

*''The New Conceptions of Matter'' (1931) *''The Next Million Years'' (1952)

References

External links

NPL biography
*
Online book: The Next Million Years, 1953
{{DEFAULTSORT:Darwin, Charles Galton 1887 births 1962 deaths Scientists from Cambridge Royal Engineers officers British Army personnel of World War I Military personnel from Cambridge People educated at Marlborough College Alumni of Trinity College, Cambridge Academics of the University of Edinburgh English eugenicists Darwin–Wedgwood family English physicists Fellows of the Royal Society Knights Commander of the Order of the British Empire Recipients of the Military Cross Masters of Christ's College, Cambridge Academics of the Victoria University of Manchester Royal Medal winners Presidents of the Physical Society Directors of the National Physical Laboratory (United Kingdom) British physicists Fellows of the American Physical Society International members of the American Philosophical Society