In 1919 Langdon-Davies wrote
Militarism in Education, published by Headley Brothers, a study of the effect of the militarist and nationalist content of various educational systems. He stressed the importance of environment and early influences in the education of the young, compared with heredity. During this period he was moving between London, Oxford, Berkshire, Southampton, and Ireland, where he came to know leading figures in the political world. He also made his first visit to
Catalonia, after which, in 1921, he and Connie, with their two small sons, settled for more than two years in the
Pyrenean village of
Ripoll, where he met groups of left-wing intellectuals and
Catalan nationalists. Here, reading a lot of poetry and much influenced by
Arthur Waley's translations of
A Hundred and Seventy Chinese Poems, he wrote a small book of verse,
Man on Mountain, which was printed in Ripoll and published by
Birrell and
Garnett in 1922. Since the letter
w is more widely used in English than in Catalan, the local printer was obliged to send to Barcelona for extra supplies. The new
w, however, turned out to be marginally larger than the originals so a slight discrepancy appears on most pages, making the book a collector's item. He returned to London and spent another period travelling between England, the United States and Catalonia.
The Daily News sent him to
Barcelona in 1923 to report on the coup d'état by
Miguel Primo de Rivera, which he evaluated as comparable to the
Irish question. In it, he attacked the pseudoscientists whose books were so popular in the US, particularly advocates of
racial superiority, such as
Madison Grant and
Lothrop Stoddard, whom Langdon-Davies described as "Race Fiends". Langdon-Davies's book and his passionate critiques of the scientific racism popular at the time provoked a number of counterattacks, pointing out that Langdon-Davies himself was not a professional scientist. Most of the 60 or more published reviewers of
The New Age of Faith were in agreement with John Bakeless, who wrote that "rarely has popular science been written with such spicy impertinence, such gay insouciance, or with so much intelligence and such scrupulous regard for facts...". Langdon-Davies then moved to
Sant Feliu de Guíxols, on the Catalan coast, where he stayed from 1926 to 1928 and wrote
Dancing Catalans, a study of the significance of the 'Catalan national dance', the
sardana. Twenty years later the Catalan writer
Josep Pla said that it was the best book ever published on the
sardana: "With the exception of the poetry of
Joan Maragall, there is nothing in our language comparable with this essay".
A Short History of Women, published in New York, had also appeared in 1927. In it Langdon-Davies traced the development of the idea of Woman from the primitive taboo, the Christian fear, worship of fertility, etc., which was now to be reshaped by the new knowledge.
Virginia Woolf commented on some of the author's ideas in ''
A Room of One's Own''. In 1929 he settled in
Devon but three years later (1932) he moved back to the US. Langdon-Davies'
Man and his Universe (1930) was a history of humanity's scientific views, covering the period from
Ancient Greece to
Einstein. He returned to England again in 1935 and lived at
Clapham Common. During this time, Langdon-Davies developed strong left-wing views; although not a member of the
Communist Party, he was sympathetic to its activities. His book
A Short History of the Future argued an alliance of Britain, France and the Soviet Union was necessary as a bulwark against fascist aggression. == Spanish Civil War ==