The National Liberal Federation (1877–1936) was the union of all English and Welsh Liberal Associations. It held an annual conference which was regarded as being representative of the opinion of the party's rank and file and was broadly the equivalent of a present-day party conference.

John Ramsay Bryce Muir was a British historian, Liberal Party politician and thinker who made a significant contribution to the development of liberal political philosophy in the 1920s and 1930s through his work on domestic industrial policy and his promotion of the international policy of interdependency.