Pierre-Paul Grassé (November 27, 1895 in Périgueux (Dordogne) – July 9, 1985) was a French zoologist, writer of over 300 publications including the influential 52-volume Traité de Zoologie. He was an expert on termites who rejected Neo-Darwinism and was a proponent of Neo-Lamarckism.
Biography
Education Grassé began his studies in Périgueux where his parents owned a small business. He went on to study medicine at the University of Bordeaux and studied biology in parallel, including the lectures of the entomologist Jean de Feytaud (1881–1973). Mobilized during World War I, he was forced to interrupt his studies during four years. By the end of the war he was a military surgeon. Grassé continued his studies in Paris, focusing exclusively on science. He obtained his Licence in Biology and frequented the laboratory of biologist Étienne Rabaud (1868–1956). He abandoned his preparations for the agrégation to accept a position as professor in the École Nationale Supérieure Agronomique de Montpellier (1921), where the department of zoology was led by François Picard (1879–1939). There he frequented several phytogeographers like Charles Flahault (1852–1935), Josias Braun-Blanquet (1884–1980), Georges Kuhnholtz-Lordat (1888–1965) and Marie Louis Emberger (1897–1969). He became the assistant of Octave Duboscq (1868–1943) who oriented the young Grassé toward the study of protozoan parasites. After the departure of Duboscq to Paris, Grassé worked for Eugène Bataillon (1864–1953) and there discovered techniques for experimental embryology. In 1926, Grassé became vice-director of the École supérieure de sériciculture. He submitted his theses, Contribution à l'étude des flagellés parasites, in 1926, and it was published in the Archives de zoologie expérimentale et générale.
Teaching and research In 1929, Grassé became professor of zoology at the Université de Clermont-Ferrand. He supervised the theses of several students on insects. He conducted his first field research trip in Africa in 1933–1934, and returned there several times (1938–1939, 1945, 1948). During these trips he studied termites, and became one of the great specialists on these insects. In 1935, he became an assistant professor at the Université de Paris, where he worked alongside Germaine Cousin (1896–1992), and received the Prix Gadeau de Kerville de la Société entomologique de France for his work on Orthoptera and termites. In 1939 he chaired the Société zoologique de France and in 1941 the Société entomologique de France. After having been briefly mobilized in Tours, in 1944 he succeeded Maurice Caullery as chair in zoology and the evolution of beings. Grassé was elected a member of the Académie des sciences on November 29, 1948, in the anatomy and zoology sector and presided over the institution in 1967. In 1976 he changed sectors, into the newly created animal and vegetal biology sector. Grassé received numerous honours and titles during his career: commander of the Légion d'honneur, doctor honoris causa of the universities of Brussels, Basel, Bonn, Ghent, Madrid, Barcelona and São Paulo. He was one of the founders of the Société Française de Parasitologie in 1962. He was also a member of several academic societies, including the New York Academy of Sciences and The Royal Academies for Science and the Arts of Belgium.
Publications Grassé began publishing a very big project in 1946 entitled Traité de zoologie. The 38 volumes required almost forty years of work, uniting some of the greatest names in zoology. They are still essential references in the field for the groups that are treated in their pages. Ten volumes are dedicated to mammals, nine to insects. Apart from this treatise, he led two collections published by Masson: the first, entitled Grands problèmes de la biologie, has thirteen volumes and the second is entitled Précis de sciences biologiques. Alongside Andrée Tétry, he composed the two volumes dedicated to zoology in the collection Bibliothèque de la Pléiade, published by Gallimard. He also supervised the edition of the Abrégé de zoologie (two volumes, Masson). He also composed the Termitologia (1982, 1983, 1984), a work in three volumes totalling over 2400 pages. In it Grassé compiles all available knowledge concerning termites. It was by studying symbiotic flagellates in termites that he eventually began studying their hosts. In this publication, Grassé introduced the concept of Stigmergy :
"Stigmergy manifests itself in the termite mound by the fact that the individual labour of each construction worker stimulates and guides the work of its neighbour.". He also created three scientific reviews: Arvernia biologica (1932), Insectes sociaux (1953) et Biologia gabonica (1964). He participated in several reviews like the Annales des sciences naturelles and the Bulletin biologique de la France et de la Belgique. Apart from his numerous scientific publications, he published several works popularising science such as La Vie des animaux (Larousse, 1968). He also signed the articles "Évolution" and "Stigmergie" of the Encyclopædia Universalis. Grassé also authored many works where he talks of his views on evolution and metaphysics such as Toi, ce petit Dieu (Albin Michel, 1971), L’Évolution du vivant, matériaux pour une nouvelle théorie transformiste (Albin Michel, 1973), La Défaite de l’amour ou le triomphe de Freud (Albin Michel, 1976), Biologie moléculaire, mutagenèse et évolution (Masson, 1978), L’Homme en accusation: de la biologie à la politique (Albin Michel, 1980)...
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