William Morris Hughes was an Australian politician who served as the seventh prime minister of Australia, in office from 1915 to 1923. He is best known for leading the country during World War I, but his influence on national politics spanned several decades. Hughes was a member of federal parliament from Federation in 1901 until his death, the only person to have served for more than 50 years. He represented six political parties during his career, leading five, outlasting four, and being expelled from three.