Sir Robert Borden was Plenipotentiary of Canada at the Peace Conference. With the Versailles Treaty ratified by the Canadian Parliament, Borden largely believed his work was done. He retired as Prime Minister in 1920. Although Borden died in 1937, the great legacy for Canada that derived from Borden's attitudes towards the role of the Dominions in international affairs was the drive towards a constitutional recognition of Canada's international position. Canada's control of its own foreign policy was finally confirmed in a declaration by Arthur Balfour in 1926 and the Statute of Westminster in 1931 that created the British Commonwealth of Nations. Borden helped to produce a Canada with an autonomous and independent foreign policy, the seeds of this work led to the growth of a vigorous foreign policy for Canada within a United Nations and its specialised agencies.