Ștefan Odobleja (; 13 October 1902 – 4 September 1978) was a Romanian physician and scientist, considered in Romania to be one of the precursors of cybernetics and artificial intelligence. His major work, Psychologie consonantiste (first published in 1938 and 1939, in Paris) introduced the concept of feedback in psychology, ten years before Norbert Wiener published his groundbreaking book, Cybernetics: Or Control and Communication in the Animal and the Machine. Biography Odobleja was born into a family of peasants in 1903, in Valea Izvorului (now Ștefan Odobleja), Mehedinți County, Romania. He attended the Faculty of Medicine in Bucharest and became a physician. He practiced medicine as a military doctor in Bucharest, Dej, Drobeta Turnu-Severin, Lugoj, Târgoviște, and other Romanian cities. Endowed with an uncommon capacity of work and with an astonishing inventive spirit, Odobleja left an impressive work to the posterity. His completed works run to over 50,000 pages. In 1936, Odobleja published "Phonoscopy and the clinical semiotics". In 1937, he participated in the IXth International Congress of Military Medicine with a paper entitled "Demonstration de phonoscopie", where he disseminated a prospectus in French, announcing the appearance of his future work, "The Consonantist Psychology". The most important of his writings is Psychologie consonantiste, in which Odobleja lays the theoretical foundations of the generalized cybernetics. The book, published in Paris by (vol. I in 1938 and vol. II in 1939), contains almost 900 pages and includes 300 figures in the text. The author wrote at the time that "this book is... a table of contents, an index or a dictionary of psychology, [for] a ... great Treatise of Psychology that should contain 20–30 volumes". Due to the beginning of World War II, the publication went unnoticed. The first Romanian edition of this work did not appear until 1982 (the first edition was published in French). The work was reprinted in 1983 as Cybernétique générale: psychologie consonantiste, science des sciences. Odobleja retired from the army in 1946 and lived a modest life off his military pension. He died of cancer on September 4, 1978, leaving behind extensive manuscripts. He was buried at the Orthodox Cemetery in Drobeta-Turnu Severin. Legacy His paper, "Diversity and Unit in Cybernetics" was presented at the Fourth Congress of Cybernetics and Systems in Amsterdam, August in 1978, being reportedly received "with great acclaim". As an appreciation for his work of mapping the unknown territory of the consonantist psychology,