Sewall Wright focused on combinations of genes that interacted as complexes, and the effects of inbreeding on small relatively isolated populations, which could exhibit . In a 1932 paper he introduced the concept of an in which phenomena such as cross breeding and genetic drift in small populations could push them away from adaptive peaks, which would in turn allow to push them towards new adaptive peaks. Wright's model would appeal to field naturalists such as Theodosius Dobzhansky and Ernst Mayr who were becoming aware of the importance of geographical isolation in real world populations. The work of Fisher, Haldane and Wright founded the discipline of . This is the precursor of the modern synthesis, which is an even broader coalition of ideas.
Sewall Wright (1889 - 1988) was an American geneticist who played a central part in the foundation of the modern synthesis, together with R.A. Fisher and J.B.S Haldane.
Evolutionary Genetics (Stanford Encyclopedia of …
SEWALL WRIGHT AND EVOLUTIONARY BIOLOGY William B. Provine. University of Chicago Press, Chicago, 1986. 561 pp., illus. $30. William Provine's important and excellent book is more than a biography of a towering figure in population genetics; it is an examination of the development of the neo-Darwinian synthesis that is the core of modern evolutionary theory. Every student of evolution will profit by reading the book. Wright, whose publications span the years 1912 to (most recently) 1984, made