Factor T
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Factor T is a book first published in 1956 by the Polish writer, philosopher, filmmaker, composer, and poet Stefan Themerson.{{cite journal |last = Wisdom|first = J. O.|authorlink = John Wisdom|date = May 1958|title = Review|journal = The British Journal for the Philosophy of Science|volume = 9|issue = 33|pages = 84–85|doi = 10.1093/bjps/IX.33.84|jstor = 686114}} It was originally written as a letter to Bertrand Russell.{{Cite web|url=http://www.dalkeyarchive.com/reading-stefan-themerson/|title=Reading Stefan Themerson | Dalkey Archive Press}}
Factor T is based upon Themerson's theory that the eternal tragedy (factor T) of humanity is found in the conflict between the urge to satisfy certain desires and the aversion against the actions required for such satisfaction.{{Cite book|title = Comparative Criticism|publisher = Cambridge University Press|date = 1990|isbn = 9780521390026|first = British Comparative Literature|last = Association|page = 235}}