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.

Question: What activities did he pursue?
Self-contained rewrite: What activities did Julian Huxley pursue after he returned home from his 1931 visit to the USSR?