Conversation so far:
Are there any interesting aspects about Julian Huxley's mid-career?
As the 1930s started, Julian Huxley travelled widely and took part in a variety of activities which were partly scientific and partly political.
Where did Julian Huxley travel as the 1930s started?
In 1931 Julian Huxley visited the USSR at the invitation of Intourist
What did Julian Huxley do while in the USSR in 1931?
In 1931 Julian Huxley visited the USSR at the invitation of Intourist, where initially he admired the results of social and economic planning on a large scale.
What activities did Julian Huxley pursue after he returned home from his 1931 visit to the USSR?
Later, back in the United Kingdom, Julian Huxley became a founding member of the think tank Political and Economic Planning.
What was Julian Huxley's family doing around the beginning of the 1930s?
In the 1930s Julian Huxley and his wife Juliette Baillot visited Kenya and other East African countries to see the conservation work.
What did Julian Huxley's think tank, Political and Economic Planning, do?
The Political and Economic Planning think tank was influential in the formation of the National Health Service, World War II and post-war planning, and development of the African colonies.

Question: What other activities was he involved in?
Self-contained rewrite: What other activities was Julian Huxley involved in during his mid-career besides traveling widely, visiting the USSR, take part in the Political and Economic Planning think tank, and visit Kenya with wife?