The Australian Aborigines' League was established in Melbourne, Australia, in 1934 by William Cooper and others, including Margaret Tucker, Eric Onus, Anna and Caleb Morgan, and Shadrach James.
In a Letter to the Editor of the West Australian, the Hon. Secretary of the Australian Aborigines League, William Cooper wrote that, "The plea of our league is "a fair deal for the dark race."
An early initiative by the League was to petition King George V for Indigenous Australians to be represented in the Australian Parliament, among other requests. 1,814 signatures were collected on the petition, although it was reported that William Cooper believed many Aboriginal people living on missions were too afraid to add their signature.
In 1938 it joined the New South Wales based Aborigines Progressive Association in staging a Day of Mourning on Australia Day (26 January) in Sydney to draw attention to the treatment of Aborigines and to demand full citizenship and equal rights. Mr. W. Ferguson, organising secretary of the Aborigines' Progressive Association of New South Wales, said of the planned national day of mourning: "The aborigines do not want protection... We have been protected for 150 years, and look what has become of us. Scientists have studied us and written books about us as though we were some strange curiosities, but they have not prevented us from contracting tuberculosis and other diseases, which have wiped us out in thousands."
On 6 December 1938, following the Kristallnacht pogrom in Germany, a delegation of League members, led by Cooper, went to the German Consulate in Melbourne with a petition protesting against the “cruel persecution of the Jewish people by the Nazi government of Germany”.