Sir Joseph Cook was an Australian politician who served as the sixth prime minister of Australia, from 1913 to 1914. He held office as the leader of the Liberal Party, having previously been leader of the Anti-Socialist Party from 1908 to 1909. His victory at the 1913 election marked the first time that a centre-right party had won an outright majority at an Australian federal election.

The Free Trade Party, officially known as the Australian Free Trade and Liberal Association, also referred to as the Revenue Tariff Party in some states, was an Australian political party, formally organised in 1887 in New South Wales, in time for the 1887 colony election, which the party won. It advocated the abolition of protectionism, especially protective tariffs and other restrictions on trade, arguing that this would create greater prosperity for all. However, many members also advocated use of minimal tariffs for government revenue purposes only. Its most prominent leader was George Reid, who led the Reid government as the fourth Prime Minister of Australia (1904–05). In New South Wales it was succeeded by the Liberal and Reform Association in 1902, and federally by the Anti-Socialist Party in 1906. In 1909, the Anti-Socialist Party merged with the Protectionist Party to form the Commonwealth Liberal Party.