Minor parties in Australian politics include a green party, the Australian Greens, the largest of the minor parties; a centrist party, Centre Alliance; a nationalist party, Pauline Hanson's One Nation; and an anti-privatisation party, Katter's Australian Party. Other significant parties in recent years have included the Palmer United Party, the socially conservative Family First Party, among others. Historically significant parties have included the United Australia Party, the Australian Labor Party (Anti-Communist), the Communist Party of Australia, the socially liberal Australian Democrats among others.