Smallpox and Syphilis

The History of Syphilis and Smallpox: Colonisation, Disease, and Impacts on Aboriginal Communities

The arrival of Europeans in Australia in 1788 brought not only colonisation but also devastating epidemic diseases. Aboriginal and Torres Strait Islander peoples had lived on the continent for tens of thousands of years with no exposure to Old World pathogens such as smallpox, influenza, measles, and syphilis (Broome, 2005). These diseases spread rapidly across communities, killing large numbers of people and causing immense social, cultural, and psychological trauma.

In Victoria, as elsewhere in Australia, outbreaks of smallpox and the introduction of syphilis during the 18th and 19th centuries decimated populations, contributing to dispossession, loss of knowledge systems, and the collapse of social structures. Similar impacts were recorded globally wherever European colonial expansion occurred.

Smallpox: A Global Killer

Origins and Spread

• Smallpox (variola virus) originated thousands of years ago, with evidence in Ancient Egypt (mummies with pockmarks).

• It spread globally through trade and colonisation, becoming one of the most feared diseases in history.

• By the 18th century, it was endemic in Europe, Asia, and Africa, with occasional pandemics killing millions (Fenner et al., 1988).

Smallpox in Australia

• The first recorded outbreak in Australia occurred around 1789, within a year of British settlement at Sydney Cove.

• The epidemic killed an estimated 50–70% of the local Aboriginal population around Port Jackson (Butlin, 1983).

• Debate remains whether the outbreak was accidental or deliberately introduced through infected blankets.

Smallpox in Victoria

• Though Victoria was colonised later (1835 onwards), Aboriginal communities already bore the impacts of earlier epidemics that spread inland from Sydney (Clark, 1995).

• When settlers arrived in the Port Phillip District, they encountered communities already reduced in number, with elders recalling previous “plague” events.

• This demographic collapse made communities more vulnerable to land loss and colonisation strategies.

Syphilis: The Silent Coloniser

Origins

• Syphilis (Treponema pallidum) is a sexually transmitted infection. Debate continues whether it originated in the Americas and spread to Europe in the 15th century, or already existed in the Old World (Harper et al., 2008).

• By the 18th–19th centuries, syphilis was widespread in Europe, often associated with poverty, sex work, and colonial encounters.

Syphilis in Australia

• Introduced through European sailors, settlers, and soldiers, syphilis spread quickly among Aboriginal communities.

• Factors included:

• Sexual exploitation of Aboriginal women by colonisers.

• Breakdown of kinship rules and ceremonial restrictions under mission life.

• Lack of access to medical care.

• Syphilis caused infertility, miscarriages, and infant mortality, further reducing already devastated populations (Broome, 2005).

Impacts on Victorian Indigenous Communities

Demographic Collapse

• Combined epidemics of smallpox, syphilis, measles, and influenza reduced Indigenous populations in Victoria by 80–90% in the 19th century (Broome, 2005; Clark, 1995).

• This loss was not only numerical but also destroyed the eldership structures, leaving fewer knowledge holders.

Disruption of Knowledge and Ceremony

• The death of Elders meant oral traditions, ceremonies, and ecological knowledge were interrupted (Rose, 1996).

• Missionisation compounded this loss by replacing Aboriginal healing systems with Western medicine while restricting cultural practices.

Psychological and Cultural Trauma

• Epidemics contributed to intergenerational trauma, with survivors witnessing the collapse of families and nations.

• Stories of mass deaths and “skin diseases” appear in oral histories as warnings about colonial contact.

Colonial Strategy

• Disease weakened resistance to colonisation. Some historians argue that settlers were aware of the impact of smallpox and used it as part of their land-grab strategy (Butlin, 1983).

Comparisons: Indigenous Experiences Worldwide

North America

• Smallpox epidemics from the 16th–19th centuries devastated Native American communities.

• Some outbreaks, such as the Fort Pitt incident (1763), involved deliberate distribution of infected blankets to Indigenous people.

South America

• Inca and Aztec populations collapsed after smallpox outbreaks in the 16th century. Some estimates suggest up to 90% population loss in parts of the Americas (Crosby, 1972).

Pacific

• In Polynesia and Hawaii, smallpox and syphilis decimated populations in the 18th–19th centuries. Hawaiian oral histories describe these diseases as “foreign death” brought by ships.

Africa

• European colonial trade spread syphilis and smallpox, weakening local communities and facilitating conquest.

The Science of Disease Impact

• Immunology: Aboriginal Australians had no prior exposure to Old World diseases, so lacked immunity (Fenner et al., 1988).

• Epidemiology: Smallpox spreads rapidly in unexposed populations; mortality rates often exceeded 50%.

• Public Health: Missions often worsened disease spread through overcrowding, poor sanitation, and malnutrition.

Psychological and Metaphysical Dimensions

• Aboriginal cosmologies interpreted disease as part of ancestral law — sometimes as punishment for broken rules or the arrival of foreign spirits (Rose, 1996).

• The inability to perform ceremonies for mass deaths caused spiritual distress.

• From a psychological perspective, the trauma of epidemic disease contributed to ongoing mental health disparities (Dudgeon et al., 2014).

Conclusion

The introduction of smallpox and syphilis during colonisation of Victoria and Australia was catastrophic for Aboriginal communities. Smallpox caused mass deaths before settlers even arrived, weakening resistance and paving the way for dispossession. Syphilis spread through colonial exploitation and disrupted family structures, fertility, and population growth.

Globally, Indigenous peoples experienced similar epidemics, with smallpox and syphilis acting as silent partners of empire. The impacts were not only physical but also cultural, spiritual, and psychological, with consequences that continue today in health disparities and intergenerational trauma.

Understanding this history is vital for truth-telling, reconciliation, and health justice. It reminds us that colonisation was not only about land and law, but also about bodies, disease, and survival.

References

Broome, R. (2005). Aboriginal Victorians: A History Since 1800. Sydney: Allen & Unwin.
Butlin, N. G. (1983). Our Original Aggression: Aboriginal Populations of Southeastern Australia 1788–1850. Sydney: Allen & Unwin.
Clark, I. D. (1995). Scars in the Landscape: A Register of Massacre Sites in Western Victoria 1803–1859. Canberra: AIATSIS.
Crosby, A. W. (1972). The Columbian Exchange: Biological and Cultural Consequences of 1492. Westport: Greenwood Press.
Dudgeon, P., Milroy, H., & Walker, R. (2014). Working Together: Aboriginal and Torres Strait Islander Mental Health and Wellbeing Principles and Practice. Canberra: Commonwealth.
Fenner, F., Henderson, D. A., Arita, I., Jezek, Z., & Ladnyi, I. D. (1988). Smallpox and Its Eradication. Geneva: WHO.
Harper, K. N., et al. (2008). “On the origin of the treponematoses: A phylogenetic approach.” PLoS Neglected Tropical Diseases, 2(1), e148.
Rose, D. B. (1996). Nourishing Terrains: Australian Aboriginal Views of Landscape and Wilderness. Canberra: Australian Heritage Commission.

Written, Researched and Directed by James Vegter (22 October 2025)

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Magic Lands Alliance acknowledges the Traditional Owners, Custodians, and First Nations communities across Australia and internationally. We honour their enduring connection to the sky, land, waters, language, and culture. We pay respect to Elders past, present, and emerging, and to all First Peoples’ communities and language groups. This article draws only on publicly available information; many cultural practices remain the intellectual property of their respective communities.