Israel Jacob Kligler

Israel Jacob Kligler was born on April 24, 1889, in Kamenets-Podolski, in what is now Ukraine.[1] He moved with his family to New York City in 1900 or 1901.[1] In the United States he pursued an ambitious academic path, earning a Bachelor of Science from the City College of New York and then both a Master of Arts and a doctorate from Columbia University.[1]

Before turning his attention to Palestine, Kligler conducted research on yellow fever in South America, establishing himself as a scientist in the field of infectious disease.[2] His move left behind what a later account described as a promising American academic career and placed his expertise at the service of the Zionist project.[2]

Kligler arrived in British-ruled Palestine in 1920 and worked with the Hadassah Medical Organization.[1][3] Malaria was then the dominant public-health crisis in the territory: a 1921 British report called it "by far the most important disease in Palestine," and much of the lowland territory purchased for Jewish settlement was malaria-infested — in part, the very reason it had been available for purchase.[2] Some settlements had already been abandoned because of the disease.[2] Kligler himself later wrote, "There is little doubt that the static condition of Palestine during the last several centuries is due almost entirely to malaria."[2]

In 1921–22 he conducted a year of experimental fieldwork on malaria control, supported by a special grant from Justice Louis D. Brandeis.[3] From 1923 to 1926 he directed a dedicated malaria research unit financed by the American Jewish Joint Distribution Committee.[3] He also co-authored with I. Weitzmann the 1922 report Malaria Control Demonstrations in Palestine, published by the Hadassah Medical Organisation in Jerusalem and cataloged as a 75-page illustrated work with a map.[4]

Kligler's strategic insight was that malaria had to be fought at the source: mosquitoes rather than only the people they infected. He argued the disease could be eliminated rather than merely endured.[2] The Malaria Research Institute he helped establish eventually employed hundreds of workers, whose methods included draining marshes, spraying larval breeding grounds, adapting techniques to different Anopheles mosquito species, and periodically altering water flow in irrigation canals to disrupt breeding cycles.[2]

In 1926 Kligler was appointed director of the Department of Hygiene at the Hebrew University of Jerusalem, a post he held until his death.[3] A 1939 account of the university described the Department of Bacteriology and Hygiene as having been added under his direction, noting that its success in combating malaria and other subtropical diseases "contributed largely to the rapid development of the country."[5] He simultaneously chaired the Va'ad Le'ummi health department, advised the Jewish National Fund on malaria, and continued consulting for Hadassah's medical organization.[3]

In 1927 Kligler opened the Malaria Research Station at Rosh Pinnah.[6] The station initiated research and the control and supervision of anti-malaria projects across Jewish settlements and in adjacent Arab villages, extending the program's benefits beyond any single community.[6] He also founded the Microbiological Society, further institutionalizing the scientific infrastructure for public health in Palestine.[3]

Among those Kligler mentored was Gideon Mer, whom he recruited into the anti-malaria service and then persuaded to return to Europe to complete his medical studies. Mer rejoined the staff of the Rosh Pinnah station in 1928.[7]

Kligler's published output spanned bacteriology, virology, immunology, hygiene, nutrition, epidemiology, and infectious-disease control. He published over 100 scientific studies.[3] His 1930 book, Epidemiology and Control of Malaria in Palestine, provided a comprehensive treatment of the disease's epidemiology, prevention, treatment, and control, as well as the biology and bionomics of local Anopheles vectors.[3] He also co-authored, with Ziporah Friedmann-Makoff, an account of the organization and management of the Yemenite refugee camp in Aden — a work that illustrates the breadth of his public-health engagement.[8]

The scale and results of Kligler's program attracted international attention. In 1925, amid concern about malaria's resurgence in Europe following the First World War, the League of Nations Health Organization dispatched its Malaria Commission to Palestine.[2] The commissioners met Kligler and came away deeply impressed. Their report called the work a "welcome and invaluable addition to practical malariology" and described those who carried it out as benefactors to the Palestinian population and to the world.[2]

Statistical results from Jerusalem illustrated the program's impact: British records counted 633 people treated for malaria in the city in 1923, 347 in 1924, and just 16 in 1928.[2] These declines reflected the combined effect of Kligler's mosquito-control methods and broader public-health improvements under the British Mandate.[2]

Malaria was in steep decline by the time Kligler died in 1944 at the age of 55.[2] Israel was declared entirely free of malaria by 1967.[2] The Times of Israel presents the anti-malaria campaign he led as helping enable settlement on land previously considered barely inhabitable and as contributing to the growth of Jewish settlement and the eventual establishment of the State of Israel.[2]

Despite this outsized impact, Kligler's reputation faded considerably after his death. Efforts to recover and document his legacy were taken up by retired lawyer Anton Alexander, who promoted his achievements, and by medical-history researcher Zalman Greenberg, who gathered documents about him — including spending three days photographing papers in the attic of Kligler's daughter-in-law in White Plains, New York.[2] Greenberg attributed the neglect partly to the apparent dislike of Kligler's Hebrew University colleagues, though this explanation reflects Greenberg's own assessment rather than an independently established fact.[2]

Biographical sources differ on Kligler's birth year. The American Jewish Archives gives April 24, 1889, and the Encyclopaedia Judaica likewise records 1889.[1][3] The National Library of Israel lists his lifespan as 1889–1944.[8] A Central Zionist Archives personal-archives guide, which spells the surname "Kliegler," associates the year 1888 with its entry.[9] Because the more detailed biographical record gives a full 1889 birth date and multiple sources agree on that year, this article uses 1889.