Valen then married Virginia Maiorana, and eventually separated from that relationship as well. His last great love, with whom he was engaged to be married, was Towako Katsuno, a Japanese professor of Geriatric Nursing. They met when she came to Chicago to do her PhD. Leigh Van Valen died on October 16, 2010 of pneumonia at St. Mary of Nazareth Hospital Center in Chicago, Illinois. Van Valen had been hospitalized for more than three months from a rare form of fungal pneumonia, complicated by a long-standing but slowly progressing form of leukemia. Van Valen's description of his work On the University of Chicago website for the Committee on Conceptual and Historical Studies of Science, Van Valen had written and posted this about himself: Publications Van Valen's publications include: "Ecological species, multispecies, and oaks" (1976), Taxon, 25:233–239. "HeLa, a new microbial species". With Virginia C. Maiorana (1991). Evolutionary Theory, 10:71–74. "The extinction of the multituberculates", Systematic Zoology 15 (1966), 261¬278 (with R.E. Sloan). "Selection in natural populations 7, New York babies (Fetal Life Study)", Annals of Human Genetics 31 (1967), 109–121 (with G.W. Mellen). "The origins of inversion polymorphisms", American Naturalist 102 (1968), 5–24 (with R. Levins). "A new evolutionary law", Evolutionary Theory 1 (1973), 1–30. "Brain size and intelligence in man", American Journal of Physical Anthropology 40 (1974), 417–423. "Multivariate structural statistics in natural history", Journal of Theoretical Biology 45 (1974), 235–247. "Group selection, sex, and fossils", Evolution 29 (1975), 87–94. "Individualistic classes", Philosophy of Science 43 (1977), 539–541. "The Archaebacteria and eukaryotic origins", Nature 287 (1980), 248–250 (with V.C. Maiorana). "Why misunderstand the evolutionary half of biology?" in E. Saarinen, ed., Conceptual Issues in Ecology, Reidel, 1982, 323–343. "Homology and causes", Journal of Morphology 173 (1982), 305–312. "Species, sets, and the derivative nature of philosophy", Biology and Philosophy 3 (1988), 49–66. "Biotal evolution: a manifesto", Evolutionary Theory 10 (1991), 1–13. "The origin of the plesiadapid primates and the nature of Purgatorius", Evolutionary Monographs 15 (1994), 1–79. "The last third of Mendel's paper", Evolutionary Theory 12 (2001), 99–100. "The evolution of menopause", Evolutionary Theory 12 (2003), 131–153. "The statistics of variation", in: Variation (B. Hallgrímsson & B. Hall, ed.), Elsevier Academic Press (2005), 29–47. "How ubiquitous is adaptation? A critique of the epiphenomenist program", Biology and Philosophy 24 (2009), 267–280. References External links University of Chicago homepage Web page dedicated to Leigh Van Valen Evolutionary biologists American biologists 1935 births