Introduction

The arrival of Europeans in Australia from 1788 brought not only colonisation but also devastating epidemic diseases. Indigenous peoples had lived on the continent for tens of thousands of years without exposure to Old World pathogens such as smallpox, influenza, measles, and syphilis (Broome 2005).

Across Victoria—including Wadawurrung, Wurundjeri, and Gunditjmara Countries—these diseases spread rapidly, causing catastrophic population loss, disrupting systems of lore, and weakening social structures. Epidemics often preceded or accompanied settlement, reshaping the demographic and cultural landscape before colonial systems were fully established (Clark 1995; Butlin 1983).

This article explores the origins and spread of smallpox and syphilis, their impacts in Victoria, and their place within a broader global pattern of disease accompanying colonisation.

Smallpox: A Global Disease of Empire

Origins and Global Spread

Smallpox, caused by the variola virus, has existed for thousands of years, with evidence found in ancient Egypt. By the eighteenth century, it was widespread across Europe, Asia, and Africa, where populations had developed some immunity through repeated exposure (Fenner et al. 1988).

European expansion enabled the disease to spread rapidly into previously unexposed regions, where mortality rates were significantly higher.

Smallpox in Australia

The first recorded outbreak occurred in 1789 around Port Jackson, killing an estimated 50–70% of local Indigenous populations within a short period (Butlin 1983).

Debate continues as to whether the outbreak was accidental or deliberately introduced. Regardless, its effects were immediate and devastating, collapsing communities and reducing resistance to colonial expansion.

Smallpox in Victoria

Although colonisation of Victoria began in 1835, communities had already been affected by earlier epidemics spreading south from New South Wales (Clark 1995).

  • Wurundjeri communities along the Birrarung carried oral histories of earlier “plague” events

  • Wadawurrung populations in the Djilang (Geelong) region were reduced prior to sustained pastoral settlement

  • Gunditjmara communities in western Victoria also experienced population decline before the expansion of grazing and settlement

This demographic collapse meant that when settlers arrived, they encountered societies already weakened, making dispossession easier to enforce (Broome 2005).

Syphilis: The Silent Coloniser

Origins and Spread

Syphilis, caused by Treponema pallidum, became widespread in Europe by the eighteenth century. It spread globally through colonial expansion, trade, and military movement (Harper et al. 2008).

Syphilis in Australia and Victoria

Syphilis was introduced through European settlers, sailors, and soldiers. In Victoria, its spread was closely linked to colonial conditions:

  • Sexual exploitation of Indigenous women by settlers

  • Breakdown of kinship systems under mission and reserve conditions

  • Limited access to healthcare and treatment

For communities across Wadawurrung, Wurundjeri, and Gunditjmara Country, syphilis contributed to infertility, miscarriages, and high infant mortality, compounding the effects of earlier epidemics (Broome 2005).

Impacts on Victorian Indigenous Communities

Demographic Collapse

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

  • Wadawurrung Country saw rapid population decline following early contact and frontier conflict

  • Wurundjeri populations were reduced prior to and during the establishment of Melbourne

  • Gunditjmara communities experienced losses that affected the maintenance of aquaculture systems such as Budj Bim

This loss reduced the number of Elders and knowledge holders essential to maintaining systems of lore.

Disruption of Lore, Knowledge, and Ceremony

The death of Elders led to interruptions in oral knowledge systems:

  • Ecological knowledge tied to seasons, fire, and water management was weakened

  • Ceremonial practices were disrupted or could not be performed

  • Language transmission declined significantly (Rose 1996)

Mission systems further restricted cultural practices, replacing Indigenous healing systems with Western medicine and limiting access to Country.

Psychological and Cultural Trauma

Epidemics contributed to deep psychological impacts:

  • Communities witnessed large-scale deaths within short periods

  • Survivors experienced grief, displacement, and loss of identity

  • Oral histories describe disease as a profound rupture linked to colonial arrival

These experiences form part of ongoing intergenerational trauma, reflected in contemporary health disparities (Dudgeon et al. 2014).

Disease and Colonisation as Interconnected Processes

Disease was not separate from colonisation—it was deeply intertwined with it.

  • Epidemics weakened resistance to land seizure

  • Population decline enabled faster expansion of pastoral settlement

  • Some historians argue that colonial actors were aware of disease impacts and, in some cases, exploited them (Butlin 1983)

In Victoria, this dynamic contributed to the rapid occupation of Wadawurrung plains, Wurundjeri river systems, and Gunditjmara wetlands.

Scientific Dimensions of Epidemic Impact

From a scientific perspective:

  • Immunology: Indigenous populations had no prior exposure to smallpox or syphilis, resulting in high mortality rates (Fenner et al. 1988)

  • Epidemiology: Smallpox spreads rapidly in unexposed populations, often with mortality exceeding 50%

  • Public Health conditions: Missions and reserves, characterised by overcrowding and poor sanitation, intensified disease spread

These factors created conditions for repeated outbreaks and long-term population decline.

Global Comparisons

The experience in Victoria reflects a global pattern:

  • North America: Smallpox devastated Indigenous nations, with some documented cases of deliberate infection (Crosby 1972)

  • South America: Epidemics contributed to the collapse of Inca and Aztec populations, with mortality rates up to 90%

  • Pacific Islands: Diseases introduced by European ships caused widespread depopulation

  • Africa: Colonial expansion spread disease alongside economic exploitation

These parallels demonstrate that disease was a consistent companion of empire.

Cultural and Spiritual Dimensions

Within Indigenous worldviews, disease is understood through relationships between people, Country, and spiritual systems.

Epidemics disrupted:

  • The ability to conduct ceremony for the dead

  • The balance between human and ecological systems

  • Cultural interpretations of illness and healing

Rather than simply biological events, these outbreaks represented a profound disruption to systems of lore, identity, and belonging (Rose 1996).

Conclusion

The introduction of smallpox and syphilis during colonisation had catastrophic impacts on Indigenous communities in Victoria and across Australia. Smallpox caused rapid population collapse, often before sustained settlement occurred, while syphilis spread through colonial conditions, affecting fertility, health, and family structures.

For Wadawurrung, Wurundjeri, and Gunditjmara peoples, these diseases disrupted systems of lore, knowledge transmission, and connection to Country. Globally, similar patterns reveal that epidemic disease was a central mechanism of colonisation.

Understanding this history is essential to truth-telling and health justice. It highlights that colonisation was not only about land and governance, but also about bodies, survival, and the enduring resilience of Indigenous communities.

References

Broome, R 2005, Aboriginal Victorians: A History Since 1800, Allen & Unwin, Sydney.
Butlin, NG 1983, Our Original Aggression, Allen & Unwin, Sydney.
Clark, ID 1995, Scars in the Landscape, Aboriginal Studies Press, Canberra.
Crosby, AW 1972, The Columbian Exchange, Greenwood Press.
Dudgeon, P, Milroy, H & Walker, R 2014, Working Together, Commonwealth of Australia.
Fenner, F et al. 1988, Smallpox and Its Eradication, WHO, Geneva.
Harper, KN et al. 2008, ‘On the origin of the treponematoses’, PLoS Neglected Tropical Diseases, 2(1).
Rose, DB 1996, Nourishing Terrains, 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.