Leo Stanley
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Leo Leonidas Stanley (1886 – 1976) was an American surgeon who served as the Chief Surgeon of the
San Quentin State Prison San Quentin Rehabilitation Center (SQ), formerly known as San Quentin State Prison, is a California Department of Corrections and Rehabilitation state prison for men, located north of San Francisco in the unincorporated area, unincorporated place ...
from 1913 to 1951. He was most notable for performing unethical human experiments on inmates during his tenure.


Biography


Early life

Stanley was born in
Buena Vista, Oregon Buena Vista is an unincorporated community in Polk County, Oregon, United States. It is located on the Willamette River, and is the western landing for the Buena Vista Ferry. It is approximately south-southeast of Independence. History Buen ...
. His father was a country doctor. When Stanley was 9, the family moved to
San Luis Obispo County, California San Luis Obispo County (), officially the County of San Luis Obispo, is a County (United States), county on the Central Coast of California. As of the 2020 United States census, the population was 282,424. The county seat is San Luis Obispo ...
, where he studied at Paso Robles High School. In 1903, Stanley studied at the
Stanford University Leland Stanford Junior University, commonly referred to as Stanford University, is a Private university, private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth ...
. In 1904, he dropped out and worked as a newsboy on the Southern Pacific railway, though he eventually returned to Stanford to finish his degree. In 1908, he began studying to be a medical doctor at the
Cooper Medical College The Stanford University School of Medicine is the medical school of Stanford University and is located in Stanford, California, United States. It traces its roots to the Medical Department of the University of the Pacific, founded in San Fran ...
in San Francisco, and graduated in 1912. A month before his graduation, Stanley married Romaine Stanley, who was a secretary at the college.


Career at San Quentin

In 1913, despite having no surgical experience, Stanley was hired as the Chief Surgeon for
San Quentin State Prison San Quentin Rehabilitation Center (SQ), formerly known as San Quentin State Prison, is a California Department of Corrections and Rehabilitation state prison for men, located north of San Francisco in the unincorporated area, unincorporated place ...
. Stanley believed that diseases, in particular
endocrine disease Endocrine diseases are disorders of the endocrine system. The branch of medicine associated with endocrine disorders is known as endocrinology. Types of disease Broadly speaking, endocrine disorders may be subdivided into three groups: # Endocri ...
s, were the cause of crime, and wrote in his memoir that "perhaps the outworn glands look for solace in strange directions." He was a strong supporter of testicles grafting. The now-debunked theory that testicular transplant could cause male rejuvenation and age reversal was first proposed in 1889 and grew popular during the 1920s. Stanley performed grafting experiments on prisoners, transplanting testicles from executed prisoners to other inmates. Animal testicles (from goats, boars, rams, and deer) were also used, if testicles could not be procured from executed prisoners. Stanley believed that these procedures could cure afflictions such as pedophilia, depression, asthma, acne,
neurasthenia Neurasthenia ( and () 'weak') is a term that was first used as early as 1829 for a mechanical weakness of the nerves. It became a major diagnosis in North America during the late nineteenth and early twentieth centuries after neurologist Georg ...
and
melancholia Melancholia or melancholy (from ',Burton, Bk. I, p. 147 meaning black bile) is a concept found throughout ancient, medieval, and premodern medicine in Europe that describes a condition characterized by markedly depressed mood, bodily complain ...
. By 1919, Stanley was recognized by the
United Press United Press International (UPI) is an American international news agency whose newswires, photo, news film, and audio services provided news material to thousands of newspapers, magazines, radio and television stations for most of the 20th ...
Dispatch as "an international figure in the surgical world through his successful operations in rejuvenating old and senile prisoners by transplanting the interstitial glands of murderers who have paid the law’s penalty." In 1928, Stanley was sued by the family of executed inmate Clarence Kelly for mutilation of a corpse, though Stanley was not convicted. By 1940, Stanley had performed over 10,000 testicular implants in San Quentin. Stanley was also a proponent of
racial segregation Racial segregation is the separation of people into race (human classification), racial or other Ethnicity, ethnic groups in daily life. Segregation can involve the spatial separation of the races, and mandatory use of different institutions, ...
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 ...
. Stanley's legacy is covered extensively in Chapter 2 of the book
Carceral Apartheid ''Carceral Apartheid: How Lies and White Supremacists Run Our Prisons'' is a 2025 book by sociologist and author Brittany Friedman, published by The University of North Carolina Press. Synopsis ''Carceral Apartheid'' examines how systemic racis ...
. While racial segregation was not enforced in San Quentin when Stanley arrived, Stanley oversaw the building of a new hospital that allowed segregation. Californian laws at the time allowed Stanley to forcibly sterilize inmates, though only up to a certain proportion. As a result, Stanley also encouraged voluntary sterilization, which led to around 600 total sterilization by 1940 and San Quentin far outpacing other Californian prisons in their sterilization program. Amongst those targeted for sterilization were homosexual and bisexual inmates. In his memoir, Stanley stated that "sterilization, when given its chance, will do much to stamp out crime. The right to bear children will in time be reserved to the fit." Other experiments conducted by Stanley included thyroid removals for badly-behaving inmates and injecting ground-up testicles into the abdomens of inmates. Stanley also performed plastic surgeries on inmates, believing that they would be less likely to commit crimes if their appearances could help them find more work. He encouraged his interns to perform experiments on inmates, explaining that "patients could be under daily observation, and the 'follow up' conditions were ideal." Contemporary reports mostly praised Stanley's efforts. In particular, the presence of professional medical staff meant that San Quentin was more sophisticated in medical treatments than other United States prison. Prison reformer Austin MacCormick praised San Quentin as one of "the best... in all the state institutions of the country." Stanley, influenced by his wife's struggle with
tuberculosis Tuberculosis (TB), also known colloquially as the "white death", or historically as consumption, is a contagious disease usually caused by ''Mycobacterium tuberculosis'' (MTB) bacteria. Tuberculosis generally affects the lungs, but it can al ...
, improved lighting and air-flow at his new hospital. Stanley's wife Romaine died of tuberculosis in 1926. After her death, Stanley briefly left the prison in 1929 to become the ship's surgeon on the . In 1933, Stanley briefly served as the San Quentin warden when Warden
James B. Holohan James Bernard Holohan (June 19, 1871 – January 31, 1947) was an American politician and former warden of the San Quentin State Prison who served on the California State Senate from 1909 to 1913 and from 1937 to 1941. Early life and education ...
was recovering from an illness. Stanley remarried Bernice Holthouse in 1938.


Second World War

In December 1941, shortly following the Japanese
attack on Pearl Harbor The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Empire of Japan on the United States Pacific Fleet at Naval Station Pearl Harbor, its naval base at Pearl Harbor on Oahu, Territory of ...
, Stanley was called into service as a lieutenant commander in the
United States Navy Reserve The United States Navy Reserve (USNR), known as the United States Naval Reserve from 1915 to 2004, is the Reserve Component (RC) of the United States Navy. Members of the Navy Reserve, called reservists, are categorized as being in either the S ...
. He was posted to the naval hospital on
Mare Island Mare Island (Spanish language, Spanish: ''Isla de la Yegua'') is a peninsula in the United States in the city of Vallejo, California, about northeast of San Francisco. The Napa River forms its eastern side as it enters the Carquinez Strait junc ...
, then the San Francisco Naval Officer Procurement, the Pearl Harbor naval hospital and finally the
Treasure Island ''Treasure Island'' (originally titled ''The Sea Cook: A Story for Boys''Hammond, J. R. 1984. "Treasure Island." In ''A Robert Louis Stevenson Companion'', Palgrave Macmillan Literary Companions. London: Palgrave Macmillan. .) is an adventure a ...
naval hospital. Meanwhile, U.S. Navy physicians performed medical experiments on San Quentin inmates, many of whom volunteered due to patriotic fervor.


Later life and death

After the war, he returned to his position at San Quentin, though he would find the newly-reorganized
California Department of Corrections The California Department of Corrections and Rehabilitation (CDCR) is the penal law enforcement agency of the government of California responsible for the operation of the California state prison and parole systems. Its headquarters are in Sacra ...
now uses therapy as the guiding model. Stanley retired from San Quentin in 1951. He operated a private practice in
San Rafael, California San Rafael ( ; Spanish language, Spanish for "Raphael (archangel), St. Raphael", ) is a city in and the county seat of Marin County, California, United States. The city is located in the North Bay (San Francisco Bay Area), North Bay region of th ...
, for a short time, and later worked as a physician on cruise ships. In his final years, he stayed at his farm, the Crest Farm, in
Marin County, California Marin County ( ) is a County (United States), county located in the northwestern part of the San Francisco Bay Area of the U.S. state of California. As of the 2020 United States census, 2020 census, the population was 262,231. Its county seat a ...
. He died at the age of 90, with no children.


References


Bibliography

* {{DEFAULTSORT:Stanley, Leo Leonidas 1886 births 1976 deaths Stanford University School of Medicine alumni 20th-century American physicians American eugenicists American segregationists Law enforcement officials from California People from Polk County, Oregon People from San Luis Obispo County, California American prison officials San Quentin State Prison San Quentin State Prison wardens United States Navy personnel of World War II Human subject research in the United States History of medicine in California