In 1975, South Australia became the first Australian state to decriminalise homosexuality. This landmark legislation marked a turning point in the national journey toward dignity, safety, and equality for LGBTIQA+ Australians. While change was long overdue, South Australia led the way—quietly but decisively—through a powerful act of justice.
The Legacy of Dr George Duncan
The 1972 death of Dr George Duncan, a gay academic who drowned after being thrown into the River Torrens, shocked Australia and became a catalyst for reform. Although the perpetrators were never convicted, public outrage demanded accountability—not just for the crime, but for the legal system that enabled such violence.
Reform through courage and persistence
Early efforts by Liberal MP Murray Hill laid the groundwork, but it was Attorney-General Peter Duncan’s 1975 private member’s bill that finally achieved full decriminalisation. On 2 October 1975, the change arrived without fanfare. While few dared to celebrate openly, it marked the beginning of a new chapter in human rights and social justice.
Explore the program of commemorative activities
Fifty years on, we honour the progress made with a range of commemorative activities.
Explore the full range of commemorative activities
If you wish to have your event or activity listed here, please email the details to hunter.office@parliament.sa.gov.au
With thanks to the Premier’s Commemorative Committee: Hon. Ian Hunter MLC (Chair), Hon. Michelle Lensink MLC, Hon. Robert Simms MLC, Hon. David Pisoni MP, and Lucy Hood MP.
Commemorative artwork by Cul-de-sac Creative.