Theodosius Dobzhansky (1900-1975) was one of the principal architects of the so-called synthetic theory of evolution. 2 Born and initially trained in Russia, where he became an entomologist and zoologist with wide-ranging interests, he brought a rich background in systematics and study of natural populations with him when he came to the United States to learn genetics in the laboratory of T. H. Morgan in 1927 (Adams 1994). In the end, he remained in the US, in part because of political developments in Russia, where he was ultimately declared a nonperson. Dobzhansky utilized his double background of work with natural populations and in Mendelian genetics in writing what came to be the single most influential book in the formative period of the synthetic theory of evolution (Dobzhansky 1937). Dobzhansky is a particularly interesting figure to study because of the cultural dualities (or, rather, multiplicities) which he embodies, because his work forcibly reconciled biological disciplines (systematics and natural history on the one hand, genetics on the other) that had not only drifted apart, but had built strong evidentiary bases for conflicting claims, and because,
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