Rudd vs Gillard: How Labor's 2010 Coup Changed Australian Politics

When Kevin Rudd led Labor to a landslide victory in 2007, few could have predicted he would be gone before the next election. Yet in June 2010, Julia Gillard became Australia's first female prime minister not through the ballot box but through a caucus vote — making history in the most uncomfortable way possible. It was the first time any Australian party had removed a sitting prime minister during their first term back in government.

Gillard's justification was direct: a good government had lost its way. But unpacking what she meant requires a journey back to late 2009 and the wreckage of Rudd's flagship climate policy.

At the Copenhagen Climate Conference, Rudd had staked enormous political capital on his Emissions Trading Scheme — a market-based mechanism that would allocate carbon permits to companies and let cleaner operators profit by selling their surplus. The policy collapsed before it left the Senate. In a strange confluence of opposition, conservative leader Tony Abbott joined with the Greens — for entirely opposite reasons — to defeat it. Abbott's side opposed any carbon cost; the Greens felt the scheme was too weak.

The damage to Rudd was more than legislative. Gillard later described him as returning from Copenhagen personally miserable and politically paralysed. His own health minister backed parts of that account, alleging he was dismissive of ministers' contributions to the point where cabinet members felt humiliated. Gillard even claimed she began chairing meetings on his behalf as his decision-making stalled.

The breaking point for many colleagues came when Rudd quietly shelved the ETS entirely — and the media found out before his own cabinet did. Among those blindsided was Tony Burke, then minister for sustainability, environment, water, population and communities. Burke, now Labor's leader of the House, learned about the abandonment of the government's centrepiece environmental policy through the press rather than the prime minister.

Not everyone accepts Gillard's version of events. Both Prime Minister Anthony Albanese and Energy Minister Chris Bowen served under Rudd during the same period and have disputed her account. Bowen specifically stated there was no observable change in Rudd's behaviour after Copenhagen — suggesting the narrative of a broken leader was constructed in hindsight to justify what followed.

A second thread emerged six months after the coup when WikiLeaks published classified cables between the US embassy in Canberra and Washington. One 2009 cable profiled Mark Arbib, a NSW Right faction power broker and Labor senator who was noted as meeting with American diplomats regularly. Arbib had already demonstrated his appetite for decisive internal action — before entering the Senate he had served as NSW Labor's party secretary, playing a central role in the removal of Premier Morris Iemma and then helping install Nathan Rees, only to move against him shortly after.

The NSW Right faction, historically dominant within Labor and long associated with hard-nosed factional discipline, sat at the heart of the decision to move against Rudd. Whether Copenhagen broke the prime minister or merely handed his internal opponents a compelling story, the consequences were permanent: Australian politics entered an era of leadership instability that would define the following decade.