Sewall Wright & the Shifting Balance Theory

David's penultimate post on Sewall Wright, Notes on Sewall Wright: The Shifting Balance Theory - Part 1:

Two catch-phrases indissolubly linked with Sewall Wright are the adaptive landscape, and the shifting balance. In preparing my note on Wright's concept of the adaptive landscape I was surprised to discover that Wright himself seldom if ever used this expression. I could not find a single example. I was therefore half-expecting that I would not find any reference to the shifting balance either - and I would have been half-right. Wright did use that term, but not, as far as I can find, until surprisingly late in his long career....

Part 2 coming soon....

Related: Notes on Sewall Wright: the Adaptive Landscape, Notes on Sewall Wright: Migration, Notes on Sewall Wright: Population Size, Notes on Sewall Wright: the Measurement of Kinship, Notes on Sewall Wright: Path Analysis and On Reading Wright.

Tags

More like this

Notes on Sewall Wright: the Adaptive Landscape: My series of posts on the work of Sewall Wright is now approaching its (anti?)climax. The next post, on the shifting balance theory, should be the last. The present note deals with a closely related subject. Wright introduced the concept of the '…
Notes on Sewall Wright: The Shifting Balance Theory (Part 2): Part 1 of this note dealt with Sewall Wright's Shifting Balance theory of evolution (the SBT) in its original form, as propounded between 1929 and 1931. This final part deals with subsequent developments in the theory. These include…
Notes on Sewall Wright: Population Size: Continuing my series of notes on the work of Sewall Wright, I come to the question of population size. This is important in Wright's formulation of population genetics and his evolutionary theory generally. One of the major differences between Wright and R.…
R. A. Fisher and the Adaptive Landscape: ...My own interpretation is that Fisher was sceptical about the value of the landscape concept as such, because both environmental and genetic conditions were too changeable for the metaphor of a 'landscape' to be useful. For Fisher the question of the '…