In 1929, Stanley Bruce was replaced as Australia's Prime Minister by
James Scullin, and McDougall felt his position in London was insecure under the
Labor Party administration. In fact he remained at Australia House until 1946. He supported Scullin for the
1930 Imperial Conference, and weathered a salary cut by writing, in particular for
Lord Beaverbrook. In the field of international nutrition, he did so effectively, beginning with a memorandum of January 1935, "The Agriculture and the Health Problems". With Bruce providing introductions, he met social figures and those in power. The speech also nodded to contemporary nutritional thinking by stating "calories are not enough". Bruce and McDougall then promoted the slogan "marry health and agriculture"; the implication that
agricultural policy might have global impact on public health issues was innovative, and has been called "a major landmark in the history of nutrition". Boyd Orr, too, had contributed to the formulation. Behind the speech was a notable working paper. While the political authority of the League dropped away in the 1930s, it supported technical research on global problems. The Burnet–Aykroyd report of 1935, authored by
Étienne Burnet and
Wallace Rundell Aykroyd, moved nutrition as a public policy issue into the domain of
public health. The
Health Organization of the League of Nations was then asked in 1936 to set up a
nutrition section. McDougall worked with others on the
Nutrition – Final Report of the Mixed Committee of 1937 that resulted. Continuing in the same direction, McDougall in 1938 chaired a subcommittee of the League's
Economic and Financial Organization, on
standard of living (which the League characterised as "human
well-being"). It was a further "mixed committee", with
ILO representation, on which McDougall had an ally in
Noel Hall: the topic was cross-cultural and contentious. McDougall, Neal and Boyd Orr were agreed in an approach to alleviating the economic austerity of the times. Bruce produced the "Bruce Report" on standard of living. The outbreak of
World War II made all these efforts moot by 1940. ==The Food and Agriculture Organization==