The document summarizes the three main political parties in Australia: 1) The Labor Party is Australia's oldest party, formed in 1891 to represent workers. It has had several Prime Ministers and has shifted between socialist and pragmatic ideologies. 2) The Liberal Party formed in 1944 to provide an alternative to Labor. It is currently the most successful post-war party and follows a conservative liberal ideology focused on individual freedoms and a market economy. 3) The Greens emerged from environmental campaigns and gained representation in the 1980s. Their ideology focuses on ecological sustainability, social justice, and non-violence.