Goodrick-Clarke described his research interests as "globalization of esotericism in modernity; Paracelsica;
Rosicrucianism;
Hermeticism, pietism and alchemy in the Enlightenment era; esotericism and modern political ideology;
conspiracy theory". His 1982 Oxford Ph.D. dissertation,
The Ariosophists of Austria and Germany, 1890–1935: Reactionary Political Fantasy in Relation to Social Anxiety, was the basis for his most influential work,
The Occult Roots of Nazism. This book is about the connections between
Nazism and occultism. Goodrick-Clarke wrote that he found the previous discussion of the connection to be "a literature rich in mystery and suggestion, but short on facts and hard evidence", but that after looking into it he found "there was a hard kernel of truth" to the connection, the improbable accounts disregarded, once he had done historical research. He wrote another book as a follow-up to
The Occult Roots of Nazism,
Black Sun, published in 2002, focusing on modern occult kinds of
neo-Nazism. His final book,
The Western Esoteric Traditions: A Historical Introduction, was published by
Oxford University Press in 2008. He also contributed several chapters to academic edited volumes and encyclopedias. which was later reissued as part of the
Western Esoteric Masters series. In 2005 he edited a collection on
Helena Blavatsky titled
Helena Blavatsky, also part of the
Western Esoteric Masters series. He and his wife co-edited and prefaced the book
G.R.S. Mead and the Gnostic Quest in 2005, about Theosophist
G. R. S. Mead. Goodrick-Clarke also translated several books, including in 2002
Emanuel Swedenborg: Visionary Savant in the Age of Reason by Ernst Benz and
Western Esotericism: A Brief History of Secret Knowledge by
Kocku von Stuckrad in 2005. == Personal life ==