Public Health During Industrialization

The Industrial Revolution created severe public health problems. The rapid growth of the industrial cities, the overcrowding, the lack of sanitation, and the pollution from industry created conditions in which diseases such as cholera, typhus, and tuberculosis could spread rapidly, and the death rates in the industrial cities were much higher than in the rural areas.

The Public Health Crisis of the Industrial Revolution

The Industrial Revolution created a public health crisis of unprecedented severity. The rapid growth of the industrial cities, combined with the lack of adequate housing, sanitation, and public services, created conditions in which disease could flourish, and the death rates in the industrial cities were often shockingly high. The most important health problem was infectious disease. The overcrowding, the lack of clean water, and the open sewers created ideal conditions for the spread of diseases such as cholera, typhus, and tuberculosis, all of which were common in the industrial cities.

The Response to the Public Health Crisis

The response to the public health crisis of the Industrial Revolution came in several forms. The first response was the development of the science of epidemiology, the study of the distribution and determinants of disease. The work of John Snow, who demonstrated that cholera was spread by contaminated water, and the work of William Farr, who developed the system of vital statistics that allowed the patterns of disease to be studied, were major breakthroughs in the understanding of public health. The article on cholera outbreaks describes the most feared of the epidemic diseases in more detail. The article on sanitation reform describes the most important public health reform of the period.

The Effects of the Public Health Reforms

The public health reforms of the nineteenth century had a dramatic effect on the health of the urban population. The death rates in the industrial cities fell sharply in the second half of the nineteenth century, and life expectancy rose correspondingly. The improvement was due to a combination of factors, including the better sanitation, the cleaner water, the improved housing, and the better nutrition of the working class.

The Legacy of the Industrial Public Health Crisis

The public health crisis of the Industrial Revolution, and the response to it, was one of the most important social developments of the nineteenth century. The development of modern public health policy, the building of the new infrastructure, and the improvement of the urban environment all contributed to the dramatic improvement in the health of the urban population.

John Snow, the Broad Street Pump, and the Birth of Epidemiology

The most famous single event in the history of public health is John Snow’s investigation of the 1854 cholera outbreak in the Soho district of London. Snow, a physician and pioneer of anesthesia, had been working on cholera since the 1832 outbreak, and he had been skeptical of the prevailing miasma theory — the idea that disease was spread by “bad air” — since the early 1840s. When the 1854 outbreak began in late August, Snow systematically mapped the cases and traced them to a public water pump on Broad Street (now Broadwick Street). The pump, which drew water from a well that had been contaminated by a leaking cesspool, was removed on September 8, 1854, and the outbreak subsided. Snow’s investigation, published as On the Mode of Communication of Cholera (1855), is the founding text of modern epidemiology, and the Broad Street pump is a landmark in the history of public health. The definitive confirmation of the germ theory of disease came in the 1880s, with the work of Robert Koch (cholera, 1883; tuberculosis, 1882) and Louis Pasteur (anthrax, 1876; rabies, 1885), but the practical work of public health had already begun to be carried out on Snow’s principles.

Edwin Chadwick, William Farr, and the Sanitary Movement

The British public health movement of the 1840s was driven by the work of three men: Edwin Chadwick, William Farr, and Thomas Southwood Smith. Chadwick, the Benthamite secretary to the Poor Law Commission, was the political force behind the sanitary movement; his 1842 Report on the Sanitary Condition of the Labouring Population of Great Britain, which documented the connection between filth and disease in the industrial cities, was the most influential public document of the period. Farr, the compiler of abstracts at the General Register Office from 1839, was the statistical brain; he developed the system of vital statistics that made it possible to measure the demographic impact of public health measures. Southwood Smith, a physician and sanitary reformer, was the medical authority; his reports on the sanitary condition of the East End of London, and his work on quarantine and on the fever wards of the metropolitan hospitals, were the basis for the sanitary legislation of the 1840s. The Public Health Act of 1848 established a General Board of Health with Chadwick as its first chief administrator; the Local Government Act of 1858 and the Public Health Act of 1875 consolidated the system.

Urban Mortality in the Industrial City

The mortality data from the British industrial cities is the most important source for the impact of industrialization on public health. The mean age at death in Liverpool in 1841 was 26 years, in Manchester 24, in Leeds 23 — figures that were shockingly low compared with the rural districts, where the mean age at death was 38 to 45 years. The Manchester Statistical Society, founded in 1833, was the first organization to systematically collect and publish these data, and the Reports of the Registrar-General, published annually from 1839, were the most comprehensive source. The principal causes of death in the industrial cities were the “fever” diseases — typhus, typhoid, and relapsing fever — which were spread by contaminated water, and the “consumption” diseases — tuberculosis, bronchitis, and pneumonia — which were spread by overcrowded housing. The mortality data from the 1840s and 1850s is the empirical basis for the claim of the standard “pessimist” interpretation of the Industrial Revolution, and for the revisionist claim of Robert C. Allen and others that the cities were the locus of economic opportunity rather than of absolute deprivation.

The McKeown Thesis and Its Critics

The most influential single work on the long-term improvement of public health is Thomas McKeown’s The Modern Rise of Population (1976), which argued that the rapid growth of population in Britain and other industrial countries after 1800 was primarily a result of reduced mortality from infectious disease, and that the principal cause of the reduced mortality was improved nutrition rather than medical advances or public health measures. The McKeown thesis, sometimes called the “McKeown debate,” has been a major site of historical and medical controversy since the 1970s. The principal critics, including Simon Szreter in Health and Wealth (1988) and Robert Woods in The Demography of Victorian England and Wales (2000), have argued that McKeown underestimated the role of public health measures — particularly the sanitary reforms of the 1840s and 1850s, the provision of clean water, and the improvement of housing — and that nutrition alone cannot explain the decline. The most recent literature, including Michael Anderson’s British Population History (2002) and the Cambridge Group’s work, has emphasized the multiplicity of factors involved and has moved away from the single-cause explanations of the older debate.

The Germ Theory Revolution

The development of the germ theory of disease in the 1870s and 1880s was a defining moment in the history of public health. The work of Louis Pasteur in France and Robert Koch in Germany provided the theoretical foundation for the development of vaccines, antibiotics, and the modern public health system. The Koch postulates — a set of four criteria for establishing a causal relationship between a microbe and a disease — were published in 1883, and they became the methodological basis for the new bacteriology. The discoveries of the specific agents of tuberculosis (1882), cholera (1883), diphtheria (1884), tetanus (1884), and plague (1894) allowed the development of specific diagnostic tests, vaccines, and treatments. The public health consequence of the germ theory was the development of the modern public health laboratory, the establishment of the Pasteur Institute in Paris (1888) and the Robert Koch Institute in Berlin (1891), and the development of the modern system of disease surveillance. The germ theory revolution is the subject of Paul de Kruif’s Microbe Hunters (1926) and of Thomas D. Brock’s Robert Koch (1988).

Continuing Relevance: Public Health and Modern Industrial Society

The public health problems created by the Industrial Revolution are not only of historical interest. The 2020 COVID-19 pandemic, which killed more than 7 million people worldwide and disrupted the global economy, demonstrated the continuing relevance of the public health measures first developed in the 1840s: quarantine, isolation, contact tracing, sanitation, and the use of statistical data to track the spread of disease. The 19th-century cholera epidemics and the 2020 pandemic were, in many ways, variations on a theme: the consequences of dense urban populations, global trade and travel, and the limits of national public health systems. The public health infrastructure developed in response to the Industrial Revolution — the local boards of health, the vital statistics systems, the sanitary regulations, the public water supplies — has been the foundation of the modern public health system, and it remains relevant in the 2020s. The current debates about universal health care, vaccination, and the role of public health agencies in responding to pandemics are, in many ways, continuations of the debates that began in the 1840s.

The 19th-Century Mortality Decline: Some Numbers

The improvement in urban mortality in the late 19th century is the empirical foundation of the standard-of-living debate. In Manchester, the mean age at death rose from 24 years in 1841 to 33 years in 1891, and in Liverpool from 22 years in 1841 to 30 years in 1891. The 1841 Census recorded that 16 percent of Manchester’s population lived in cellars; by 1901 the figure was less than 2 percent. The number of deaths from typhus, which had been the principal cause of death in the industrial cities, fell from 18,401 in England and Wales in 1869 to 2,003 in 1892, and the number of deaths from typhoid fell from 19,014 in 1869 to 6,646 in 1892. The 1900 mortality rate from cholera, plague, and yellow fever in the major European cities was, for the first time, lower than the mortality rate in the rural districts, reversing the pattern of the 1830s and 1840s. The improvement is the subject of Robert Woods’s The Demography of Victorian England and Wales (2000) and of the Cambridge Group’s work on the demographic transition. The most comprehensive single source is William Farr’s Vital Statistics (1885), which is the foundation of the modern study of mortality decline.

The 1848 Public Health Act and the Chadwick Report

The principal legislative achievement of the sanitary movement was the 1848 Public Health Act, passed by the Whig government of Lord John Russell after a decade of agitation. The Act, drafted by Edwin Chadwick and Thomas Southwood Smith, established a General Board of Health with Chadwick as its first chief administrator, and it gave local authorities the power to establish local boards of health, to appoint medical officers of health, and to undertake sanitary works. The Act was followed by the Metropolis Water Act of 1852, which required the metropolitan water companies to filter and to move their intakes above the tidal reaches of the Thames, and the Common Lodging Houses Act of 1851, which regulated the worst of the urban slums. The 1875 Public Health Act, the most comprehensive of the Victorian sanitary laws, consolidated the previous legislation and required every local authority to appoint a medical officer of health, to provide a clean water supply, to provide sewerage, and to regulate the built environment. The 1875 Act was the model for the sanitary legislation of the next century, and it remained the principal public health statute until the National Health Service Act of 1946 and the Public Health Act of 1948 replaced it. The history of the sanitary movement is the subject of Christopher Hamlin’s Public Health and Social Justice in the Age of Chadwick (1998) and of Anthony S. Wohl’s Endangered Lives: Public Health in Victorian Britain (1983).

The Vaccination Acts and the Prevention of Disease

The development of the smallpox vaccine by Edward Jenner in 1796 was a defining moment in the history of public health. Jenner’s An Inquiry into the Causes and Effects of the Variolae Vaccinae (1798) showed that inoculation with the cowpox virus protected against smallpox, and the technique was rapidly adopted in Britain and elsewhere. The 1840 Vaccination Act made vaccination free of charge for the poor, and the 1853 Vaccination Act made it compulsory for infants. The 1867 Vaccination Act extended the requirement to all children under 14, and the 1898 Vaccination Act introduced a “conscience clause” that allowed parents to opt out. The vaccination acts were a major example of state intervention in public health, and they were the subject of a long political debate, with the Anti-Vaccination League (founded 1866) opposing the requirement on the grounds of individual liberty. The history of vaccination is the subject of Andrea Rusnock’s Vital Accounts (2002) and of Michael Bennett’s War Against Smallpox (2020). The success of the smallpox vaccination program, which eliminated the disease in Europe by 1950 and globally by 1980, was the first major public health victory of the modern era, and it is a model for the contemporary vaccination programs of the 21st century.

Conclusion: A Public Health Tradition

The public health problems created by the Industrial Revolution were the first major public health crisis of the modern era, and the response to them established the institutions, the methods, and the principles of modern public health. The epidemiology of John Snow, the statistics of William Farr, the sanitary engineering of Edwin Chadwick, the laboratory medicine of Louis Pasteur and Robert Koch, and the social medicine of Thomas Southwood Smith together created a new discipline and a new profession, and the public health system that emerged in the late 19th and early 20th centuries is the foundation of the modern public health system. The current debates about universal health care, vaccination, and pandemic preparedness are direct descendants of the 19th-century debates, and the lessons of the 19th-century public health crisis — the importance of sanitation, the centrality of statistical data, the necessity of state intervention, the role of the laboratory, and the value of international cooperation — are still the central lessons of the modern public health tradition. The history of the public health crisis of the Industrial Revolution is, in this sense, the prehistory of the modern public health system, and the 21st-century public health challenges are direct descendants of the 19th-century ones.

Key Dates in Public Health

A short chronology of the principal dates in the history of public health:

1796 — Edward Jenner develops the smallpox vaccine
1832 — First cholera epidemic in Britain
1842 — Edwin Chadwick’s Report on the Sanitary Condition of the Labouring Population
1848 — Public Health Act; General Board of Health created
1854 — John Snow’s investigation of the Broad Street pump
1866 — Last major cholera epidemic in Britain
1875 — Public Health Act consolidates sanitary legislation
1880 — Pasteur’s chicken cholera vaccine
1882 — Koch identifies the tuberculosis bacillus
1883 — Koch identifies the cholera bacillus
1894 — Yersin and Kitasato identify the plague bacillus
1928 — Alexander Fleming discovers penicillin
1948 — National Health Service established in Britain

In this section

Cholera Outbreaks and the Birth of Modern Epidemiology The story of the cholera outbreaks that ravaged the industrial cities of the nineteenth century, and the work of John Snow and others that gave birth to modern epidemiology. Sanitation Reform The story of the sanitation reform movement, the building of the modern sewerage systems, and the transformation of public health in the industrial cities.