
The Szilárd petition, drafted and circulated in July 1945 by scientist
Leo Szilard
Leo Szilard (; hu, Szilárd Leó, pronounced ; born Leó Spitz; February 11, 1898 – May 30, 1964) was a Hungarian-German-American physicist and inventor. He conceived the nuclear chain reaction in 1933, patented the idea of a nuclear ...
, was signed by 70 scientists working on the
Manhattan Project
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project w ...
in
Oak Ridge, Tennessee
Oak Ridge is a city in Anderson and Roane counties in the eastern part of the U.S. state of Tennessee, about west of downtown Knoxville. Oak Ridge's population was 31,402 at the 2020 census. It is part of the Knoxville Metropolitan Area. O ...
, and the
Metallurgical Laboratory
The Metallurgical Laboratory (or Met Lab) was a scientific laboratory at the University of Chicago that was established in February 1942 to study and use the newly discovered chemical element plutonium. It researched plutonium's chemistry and m ...
in
Chicago, Illinois
(''City in a Garden''); I Will
, image_map =
, map_caption = Interactive Map of Chicago
, coordinates =
, coordinates_footnotes =
, subdivision_type = List of sovereign states, Count ...
. It asked President
Harry S. Truman
Harry S. Truman (May 8, 1884December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. A leader of the Democratic Party, he previously served as the 34th vice president from January to April 1945 under Franklin ...
to inform Japan of the terms of surrender demanded by the allies, and allow Japan to either accept or refuse these terms, before America used atomic weapons. However, the petition never made it through the
chain of command
A command hierarchy is a group of people who carry out orders based on others' authority within the group. It can be viewed as part of a power structure, in which it is usually seen as the most vulnerable and also the most powerful part.
Mili ...
to President Truman. It was not declassified and made public until 1961.
Later, in 1946, Szilard jointly with Albert Einstein, created the
Emergency Committee of Atomic Scientists that counted among its board,
Linus Pauling
Linus Carl Pauling (; February 28, 1901August 19, 1994) was an American chemist, biochemist, chemical engineer, peace activist, author, and educator. He published more than 1,200 papers and books, of which about 850 dealt with scientific top ...
(
Nobel Peace Prize
The Nobel Peace Prize is one of the five Nobel Prizes established by the will of Swedish industrialist, inventor and armaments (military weapons and equipment) manufacturer Alfred Nobel, along with the prizes in Chemistry, Physics, Physiolog ...
in 1962).
Background

The petition was preceded by the
Franck Report, written by the Committee on the Social and Political Implications of the Atomic Bomb, of which
James Franck
James Franck (; 26 August 1882 – 21 May 1964) was a German physicist who won the 1925 Nobel Prize for Physics with Gustav Hertz "for their discovery of the laws governing the impact of an electron upon an atom". He completed his doctorate i ...
was the chair. Szilárd and Met Lab colleague
Glenn T. Seaborg
Glenn Theodore Seaborg (; April 19, 1912February 25, 1999) was an American chemist whose involvement in the synthesis, discovery and investigation of ten transuranium elements earned him a share of the 1951 Nobel Prize in Chemistry. His work i ...
co-wrote the report, which argued that political security in a post-nuclear world would rely upon international exchange and ownership of atomic information, and that in order to avoid a nuclear arms race and preserve goodwill towards the United States, Japan must be given proper warning ahead of the dropping of the bomb.
Unlike the Franck Report, which by and large focused on the politics of using the atomic bomb and the possibility of international collaboration, the Szilárd Petition was a moral plea.
Its signatories, foreseeing an age of rapid nuclear expansion, warned that, should the United States drop the bomb to end the war in the
Pacific theater, they would "bear the responsibility of opening the door to an era of devastation on an unimaginable scale."
They feared that, in using the bomb, the United States would lose moral authority to bring the subsequent
nuclear arms race
The nuclear arms race was an arms race competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. During this same period, in addition to the American and Soviet n ...
under control.
More than 50 of the initial signatories worked in the Chicago branch of the Manhattan Project. After much disagreement among the other scientists in Chicago, lab director
Farrington Daniels
Farrington Daniels (March 8, 1889 – June 23, 1972) was an American physical chemist who is considered one of the pioneers of the modern direct use of solar energy.
Biography
Daniels was born in Minneapolis, Minnesota on March 8, 1889. Danie ...
took a survey of 150 scientists as to what they believed the best course of action would be, regarding the bomb. The results were as follows:
* 15% - the bomb should be used as a weapon by the military in order to bring about Japanese surrender with the fewest possible Allied casualties.
* 46% - the bomb should be demonstrated by the military in Japan, with the hope that surrender would follow; if not, the bomb should be used as a weapon.
* 26% - the bomb should be part of an experimental demonstration in the United States, with a Japanese delegation present as witnesses in the hope that they would bring their observations back to the government and advocate for surrender.
* 11% - the bomb should be used only as part of a public demonstration.
* 2% - the bomb should not be used in combat and total secrecy should be maintained afterwards.
Szilárd asked his friend and fellow physicist,
Edward Teller
Edward Teller ( hu, Teller Ede; January 15, 1908 – September 9, 2003) was a Hungarian-American theoretical physicist who is known colloquially as "the father of the hydrogen bomb" (see the Teller–Ulam design), although he did not care f ...
, to help circulate the petition at
Los Alamos in the hopes of recruiting more signatures. However, Teller first brought Szilárd's request to Los Alamos director
J. Robert Oppenheimer
J. Robert Oppenheimer (; April 22, 1904 – February 18, 1967) was an American theoretical physicist. A professor of physics at the University of California, Berkeley, Oppenheimer was the wartime head of the Los Alamos Laboratory and is often ...
, who told Teller that politicians in Washington were already weighing the issue and that the lab scientists would do better to stay out of it. Thus, no new signatures for the petition were collected at Los Alamos.
Summary
The petition was addressed to President Truman and states that the original intention of the Manhattan Project was to defend the United States against a possible nuclear attack by Germany, a threat that had by then been eradicated. They then pleaded with Truman to make public the full terms of surrender and to await a Japanese response before dropping the atom bomb, and to consider his "obligation of restraint":
"If after this war a situation is allowed to develop in the world which permits rival powers to be in uncontrolled possession of these new means of destruction, the cities of the United States as well as the cities of other nations will be in continuous danger of sudden annihilation ..The added material strength which this lead gives to the United States brings with it the obligation of restraint and if we were to violate this obligation our moral position would be weakened in the eyes of the world and in our own eyes. It would then be more difficult for us to live up to our responsibility of bringing the unloosened forces of destruction under control. We, the undersigned, respectfully petition: first, that you exercise your power as Commander-in-Chief, to rule that the United States shall not resort to the use of atomic bombs in this war unless the terms which will be imposed upon Japan have been made public in detail and Japan knowing these terms has refused to surrender; second, that in such an event the question whether or not to use atomic bombs be decided by you in the light of the considerations presented in this petition as well as all the other moral responsibilities which are involved."
Aftermath
In the spring of 1945, Szilárd took the petition to the man who was soon to be named Secretary of State,
James F. Byrnes
James Francis Byrnes ( ; May 2, 1882 – April 9, 1972) was an American judge and politician from South Carolina. A member of the Democratic Party, he served in U.S. Congress and on the U.S. Supreme Court, as well as in the executive branch, ...
, hoping to find someone who would pass on to President Truman the message from scientists that the bomb should not be used on a civilian population in Japan, and that after the war it should be put under international control in order to avoid a post-war arms race. Byrnes was not sympathetic to the idea at all. Thus, President Truman never saw the petition prior to the dropping of the bomb. Szilárd regretted that such a man was so influential in politics, and he appeared to also be despondent at having become a physicist, because in his career he had contributed to the creation of the bomb. After the meeting with Byrnes, he is quoted as having said, "How much better off the world might be had I been born in America and become influential in American politics, and had Byrnes been born in Hungary and studied physics." In reaction to the petition, General
Leslie Groves
Lieutenant General Leslie Richard Groves Jr. (17 August 1896 – 13 July 1970) was a United States Army Corps of Engineers officer who oversaw the construction of the Pentagon and directed the Manhattan Project, a top secret research project ...
, the director of the Manhattan Project, sought evidence of unlawful behavior against Szilárd.
The first atomic bomb, known as
Little Boy
"Little Boy" was the type of atomic bomb dropped on the Japanese city of Hiroshima on 6 August 1945 during World War II, making it the first nuclear weapon used in warfare. The bomb was dropped by the Boeing B-29 Superfortress '' Enola Gay ...
, was dropped on
Hiroshima on August 6, 1945. It was followed three days later by a second bomb, known as
Fat Man
"Fat Man" (also known as Mark III) is the codename for the type of nuclear bomb the United States Atomic bombings of Hiroshima and Nagasaki#Bombing of Nagasaki, detonated over the Japanese city of Nagasaki on 9 August 1945. It was the second ...
, over
Nagasaki
is the capital and the largest city of Nagasaki Prefecture on the island of Kyushu in Japan.
It became the sole port used for trade with the Portuguese and Dutch during the 16th through 19th centuries. The Hidden Christian Sites in th ...
. The deployment of these bombs led to an estimated
200,000 civilians dead and, debatably, Japan's eventual surrender. In December 1945, a study by
Fortune business magazine found that over three-quarters of Americans surveyed approved of the decision to drop the bombs. In spite of this, a group of the most prominent scientists of the day united to speak out against the decision, and about the future nuclear arms race.
One World or None: A Report to the Public on the Full Meaning of the Atomic Bomb' was released in 1946, containing essays by Leo Szilárd himself, Albert Einstein, Niels Bohr, Arthur Compton, Robert Oppenheimer, Harold Urey, Eugene Wigner, Edward Condon, Hans Bethe, Irving Langmuir, and others. The theme of the book, which sold over a million copies, was that nuclear arms should never be used again and that international cooperation should govern their use.
Signatories
The 70 signers at the Manhattan Project's Metallurgical Laboratory in Chicago, in alphabetical order, with their positions, were:
[
# ]David S. Anthony
David (; , "beloved one") (traditional spelling), , ''Dāwūd''; grc-koi, Δαυΐδ, Dauíd; la, Davidus, David; gez , ዳዊት, ''Dawit''; xcl, Դաւիթ, ''Dawitʿ''; cu, Давíдъ, ''Davidŭ''; possibly meaning "beloved one". w ...
, Associate Chemist
# Larned B. Asprey, Junior Chemist, S.E.D.
# Walter Bartky
Walter Bartky (1901–1958) was an American astronomer, applied mathematician, and educator, noteworthy for his role in the Manhattan Project.
Education and career
Walter Bartky received his B.S. from the University of Chicago in 1923 and his Ph.D ...
, Assistant Director
# Austin M. Brues, Director, Biology Division
# Mary Burke
Mary Patricia Burke (born April 30, 1959) is an American businesswoman. She was the Democratic candidate for Governor of Wisconsin in the 2014 election. She served as a member of the Madison, Wisconsin school board from April 30, 2012 until July ...
, Research Assistant
# Albert Cahn, Jr.
Albert may refer to:
Companies
* Albert (supermarket), a supermarket chain in the Czech Republic
* Albert Heijn, a supermarket chain in the Netherlands
* Albert Market, a street market in The Gambia
* Albert Productions, a record label
* Albert C ...
, Junior Physicist
# George R. Carlson, Research Assistant-Physics
# Kenneth Stewart Cole, Principal Bio-Physicist
# Ethaline Hartge Cortelyou, Junior Chemist
# John Crawford, Physicist
# Mary M. Dailey
Mary may refer to:
People
* Mary (name), a feminine given name (includes a list of people with the name)
Religious contexts
* New Testament people named Mary, overview article linking to many of those below
* Mary, mother of Jesus, also cal ...
, Research Assistant
# Miriam Posner Finkel
Miriam Dorothy (Posner) Finkel (22 January 1916 – 20 August 1999) was a radiobiologist who made significant contributions to molecular biology. Finkel lent her name to the Finkel-Biskis-Jinkins or FBJ virus.
Biography
Miriam Dorothy (Miriam Dvo ...
, Associate Biologist
# Frank G. Foote, Metallurgist
# Horace Owen France, Associate Biologist
# Mark S. Fred, Research Associate-Chemistry
# Sherman Fried, Chemist
# Francis Lee Friedman
Francis Lee Friedman (September 5, 1918 – August 4, 1962) was a professor of physics at the Massachusetts Institute of Technology (MIT).
Life
Born in New York City, Friedman received a BA from Harvard in 1939 and an MA also from Harvard in 1 ...
, Physicist
# Melvin S. Friedman, Associate Chemist
# Mildred C. Ginsberg, Computer
# Norman Goldstein, Junior Physicist
# Sheffield Gordon
Sheffield is a city in South Yorkshire, England, whose name derives from the River Sheaf which runs through it. The city serves as the administrative centre of the City of Sheffield. It is historically part of the West Riding of Yorkshire an ...
, Associate Chemist
# Walter J. Grundhauser, Research Assistant
# Charles W. Hagen
Charles is a masculine given name predominantly found in English and French speaking countries. It is from the French form ''Charles'' of the Proto-Germanic name (in runic alphabet) or ''*karilaz'' (in Latin alphabet), whose meaning was "f ...
, Research Assistant
# David B. Hall
David (; , "beloved one") (traditional spelling), , ''Dāwūd''; grc-koi, Δαυΐδ, Dauíd; la, Davidus, David; gez , ዳዊት, ''Dawit''; xcl, Դաւիթ, ''Dawitʿ''; cu, Давíдъ, ''Davidŭ''; possibly meaning "beloved one". w ...
, Physicist
# David L. Hill
David Lawrence Hill (November 11, 1919 – December 14, 2008) was an American nuclear physicist who worked on the Manhattan Project in World War II and was head of the Federation of American Scientists. He is best known for his 1959 testimony aga ...
, Associate Physicist, Argonne
# John Perry Howe, Jr.
John is a common English name and surname:
* John (given name)
* John (surname)
John may also refer to:
New Testament
Works
* Gospel of John, a title often shortened to John
* First Epistle of John, often shortened to 1 John
* Second ...
, Associate Division Director, Chemistry
# Earl K. Hyde, Associate Chemist
# Jasper B. Jeffries
Jasper, an aggregate of microgranular quartz and/or cryptocrystalline chalcedony and other mineral phases,Kostov, R. I. 2010. Review on the mineralogical systematics of jasper and related rocks. – Archaeometry Workshop, 7, 3, 209-213PDF/ref ...
, Junior Physicist, Junior Chemist
# William Karush, Associate Physicist
# Truman P. Kohman, Chemist-Research
# Herbert E. Kubitschek, Junior Physicist
# Alexander Langsdorf, Jr., Research Associate
# Ralph E. Lapp, Assistant To Division Director
# Lawrence B. Magnusson, Junior Chemist
# Robert Joseph Maurer, Physicist
# Norman Frederick Modine, Research Assistant
# George S. Monk
George Spencer Monk (12 September 1884 – 29 March 1973) was an American physicist. He was an expert in optics for different types of electromagnetic radiation who worked on the Manhattan Project to develop the first nuclear weapon. He lat ...
, Physicist
# Robert James Moon, Physicist
# Marietta Catherine Moore, Technician
# Robert Sanderson Mulliken
Robert Sanderson Mulliken Note Longuet-Higgins' amusing title for reference B238 1965 on page 354 of this Biographical Memoir. The title should be "Selected papers of Robert S Mulliken." (June 7, 1896 – October 31, 1986) was an American p ...
, Coordinator of Information
# J. J. Nickson, edical Doctor, Biology Division# William Penrod Norris, Associate Biochemist
# Paul Radell O'Connor
Paul may refer to:
*Paul (given name), a given name (includes a list of people with that name)
*Paul (surname), a list of people
People
Christianity
*Paul the Apostle (AD c.5–c.64/65), also known as Saul of Tarsus or Saint Paul, early Chris ...
, Junior Chemist
# Leo Arthur Ohlinger
Leo or Léo may refer to:
Acronyms
* Law enforcement officer
* Law enforcement organisation
* '' Louisville Eccentric Observer'', a free weekly newspaper in Louisville, Kentucky
* Michigan Department of Labor and Economic Opportunity
Arts ...
, Senior Engineer
# Alfred Pfanstiehl, Junior Physicist
# Robert Leroy Platzman
The name Robert is an ancient Germanic given name, from Proto-Germanic "fame" and "bright" (''Hrōþiberhtaz''). Compare Old Dutch ''Robrecht'' and Old High German ''Hrodebert'' (a compound of '' Hruod'' ( non, Hróðr) "fame, glory, honou ...
, Chemist
# C. Ladd Prosser Dr. Clifford Ladd Prosser (May 12, 1907 – February 3, 2002) was an American physiologist focused on research of comparative physiology of animals.
[Robert Lamburn Purbrick
The name Robert is an ancient Germanic given name, from Proto-Germanic "fame" and "bright" (''Hrōþiberhtaz''). Compare Old Dutch ''Robrecht'' and Old High German ''Hrodebert'' (a compound of '' Hruod'' ( non, Hróðr) "fame, glory, ho ...](_blank ...<br></span></div>, Biologist
# <div class=)
, Junior Physicist
# Wilfrid Rall, Research Assistant-Physics
# Margaret H. Rand
Margaret is a female first name, derived via French () and Latin () from grc, μαργαρίτης () meaning "pearl". The Greek is borrowed from Persian.
Margaret has been an English name since the 11th century, and remained popular througho ...
, Research Assistant, Health Section
# William Rubinson, Chemist
# B. Roswell Russell, ''position not identified''
# George Alan Sacher, Associate Biologist
# Francis R. Shonka, Physicist
# Eric L. Simmons, Associate Biologist, Health Group
# John A. Simpson, Jr., Physicist
# Ellis P. Steinberg, Junior Chemist
# D. C. Stewart, S/Sgt S.E.D.
# George Svihla
George may refer to:
People
* George (given name)
* George (surname)
* George (singer), American-Canadian singer George Nozuka, known by the mononym George
* George Washington, First President of the United States
* George W. Bush, 43rd Presiden ...
, ''position not identified'' ealth Group# Marguerite N. Swift, Associate Physiologist, Health Group
# Leo Szilard
Leo Szilard (; hu, Szilárd Leó, pronounced ; born Leó Spitz; February 11, 1898 – May 30, 1964) was a Hungarian-German-American physicist and inventor. He conceived the nuclear chain reaction in 1933, patented the idea of a nuclear ...
, Chief Physicist
# Ralph E. Telford
Ralph (pronounced ; or ,) is a male given name of English, Scottish and Irish origin, derived from the Old English ''Rædwulf'' and Radulf, cognate with the Old Norse ''Raðulfr'' (''rað'' "counsel" and ''ulfr'' "wolf").
The most common forms ...
, ''position not identified''
# Joseph D. Teresi, Associate Chemist
# Albert Wattenberg, Physicist
# Katharine Way, Research Assistant
# Edgar Francis Westrum, Jr., Chemist
# Eugene Paul Wigner, Physicist
# Ernest J. Wilkins, Jr., Associate Physicist
# Hoylande Young
Hoylande Denune Young Failey (June 26, 1903 – January 12, 1986) was an American chemist. During World War II she worked at the Manhattan Project's Metallurgical Laboratory. After the war she became the first woman to be appointed as a divisi ...
, Senior Chemist
# William Houlder Zachariasen, Consultant
See also
* Einstein–Szilárd letter
* Franck Report
*Leo Szilárd
Leo Szilard (; hu, Szilárd Leó, pronounced ; born Leó Spitz; February 11, 1898 – May 30, 1964) was a Hungarian-German-American physicist and inventor. He conceived the nuclear chain reaction in 1933, patented the idea of a nuclear ...
*Nuclear ethics
Nuclear ethics is a cross-disciplinary field of academic and policy-relevant study in which the problems associated with nuclear warfare, nuclear deterrence, nuclear arms control, nuclear disarmament, or nuclear energy are examined through one or ...
*Nuclear weapons debate
The nuclear weapons debate refers to the controversies surrounding the threat, use and stockpiling of nuclear weapons. Even before the first nuclear weapons had been developed, scientists involved with the Manhattan Project were divided over the u ...
*The Manhattan Project
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project w ...
*Harry S. Truman
Harry S. Truman (May 8, 1884December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. A leader of the Democratic Party, he previously served as the 34th vice president from January to April 1945 under Franklin ...
References
External links
Full text of the petition.
{{DEFAULTSORT:Szilard petition
Manhattan Project
Atomic bombings of Hiroshima and Nagasaki
Nuclear history of the United States
1945 documents