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Encyclopedia of Evolution.pdf - Online Reading Center

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Further <strong>Reading</strong><br />

Abrahamson, Warren G., et al. “Gall flies, inquilines, and goldenrods:<br />

A model for host-race formation and sympatric speciation.”<br />

American Zoologist 41 (2001): 928–938.<br />

Arnqvist, G., et al. “Sexual conflict promotes speciation in insects.”<br />

Proceedings <strong>of</strong> the National Academy <strong>of</strong> Sciences USA 97 (2000):<br />

10,460–10,464.<br />

Blondel, Jacques, et al. “Selection-based biodiversity at a small spatial<br />

scale in a low-dispersing insular bird.” Science 285 (1999):<br />

1,399–1,402.<br />

Carroll, Scott P., Hugh Dingle, and Stephen P. Klassen. “Genetic differentiation<br />

<strong>of</strong> fitness-associated traits among rapidly evolving<br />

populations <strong>of</strong> the soapberry bug.” <strong>Evolution</strong> 51 (1997): 1,182–<br />

1,188.<br />

Dreckmann, U., and M. Doebeli. “On the origin <strong>of</strong> species by sympatric<br />

speciation.” Nature 400 (1999): 354–357.<br />

Freeman, Scott, and Jon C. Herron. “Mechanisms <strong>of</strong> speciation.”<br />

Chap. 15 in <strong>Evolution</strong>ary Analysis, 3rd ed. Upper Saddle River<br />

N.J.: Pearson Prentice Hall, 2004.<br />

Futuyma, Douglas. <strong>Evolution</strong>. Sunderland, Mass.: Sinauer Associates,<br />

2005.<br />

Grant, Verne. Plant Speciation, 2nd ed. New York: Columbia University<br />

Press, 1981.<br />

Gray, D. A., and W. H. Cade. “Sexual selection and speciation in<br />

field crickets.” Proceedings <strong>of</strong> the National Academy <strong>of</strong> Sciences<br />

USA 97 (2000): 14,449–14,454.<br />

Howard D. J., and Stuart H. Berlocher, eds. Endless Forms: Species<br />

and Speciation. New York: Oxford University Press, 1998.<br />

Irwin, Darren E., et al. “Speciation by distance in a ring species.” Science<br />

307 (2005): 414–416.<br />

Jiggins, Chris D., et al. “Reproductive isolation caused by colour pattern<br />

mimicry.” Nature 411 (2001): 302–305.<br />

Martin, Robert A. Missing Links: <strong>Evolution</strong>ary Concepts and Transitions<br />

through Time. Sudbury, Mass.: Jones and Bartlett, 2004.<br />

Mayr, Ernst. What <strong>Evolution</strong> Is. New York: Basic Books, 2001.<br />

Ortíz-Barrientos, Daniel, and Mohamed A. F. Noor. “Evidence for a<br />

one-allele assortative mating locus.” Science 310 (2005): 1,467.<br />

Palumbi, Stephen R. The <strong>Evolution</strong> Explosion: How Humans Cause<br />

Rapid <strong>Evolution</strong>ary Change. New York: Norton, 2001.<br />

Price, Jonathan P., and Warren L. Wagner. “Speciation in Hawaiian<br />

angiosperm lineages: Cause, consequence, and mode.” <strong>Evolution</strong><br />

58 (2004): 2,185–2,200.<br />

Rundle, H. D., et al. “Natural selection and parallel speciation in<br />

sympatric sticklebacks.” Science 287 (2000): 306–308.<br />

Ryan, Peter G., et al. “Ecological speciation in South Atlantic island<br />

finches.” Science 315 (2007): 1,420–1,423.<br />

Sargent, Risa D. “Floral symmetry affects speciation rates in angiosperms.”<br />

Proceedings <strong>of</strong> the Royal Society <strong>of</strong> London B 271<br />

(2004): 603–608.<br />

Schilthuizen, Menno. Frogs, Flies, and Dandelions: The Making <strong>of</strong><br />

Species. New York: Oxford University Press, 2001.<br />

Uy, J. A. C., and G. Borgia. “Sexual selection drives rapid divergence<br />

in bowerbird display traits.” <strong>Evolution</strong> 54 (2000): 273–278.<br />

Via, Sara. “Sympatric speciation in animals: The ugly duckling grows<br />

up.” Trends in Ecology and <strong>Evolution</strong> 16 (2001): 381–390.<br />

Wake, D. B. “Incipient species formation in salamanders <strong>of</strong> the Ensatina<br />

complex.” Proceedings <strong>of</strong> the National Academy <strong>of</strong> Sciences<br />

USA 94: 7,761–7,767.<br />

Spencer, Herbert<br />

Weir, Jason T. and Dolph Schluter. “The latitudinal gradient in recent<br />

speciation and extinction rates <strong>of</strong> birds and mammals.” Science<br />

315 (2007): 1,574–1,576.<br />

Spencer, Herbert (1820–1903) British <strong>Evolution</strong>ary philosopher<br />

Herbert Spencer popularized evolutionary ideas in<br />

England and the United States. His vision <strong>of</strong> evolution was<br />

vague and, because it incorporated a Lamarckian mechanism<br />

(see Lamarckism), wrong, but it was, for a long time, more<br />

popular than Darwin’s evolutionary theory (see Darwin,<br />

Charles; origin <strong>of</strong> species [book]). Spencer was lecturing<br />

about evolutionary ideas before Darwin published the Origin<br />

<strong>of</strong> Species, and Darwin derived part <strong>of</strong> his theory—if only a<br />

single phrase—from Spencer.<br />

Born April 27, 1820, Spencer grew up in an intellectual<br />

environment (son <strong>of</strong> a schoolmaster) and spent his life<br />

writing a great outpouring <strong>of</strong> philosophical works. <strong>Evolution</strong><br />

was at the core <strong>of</strong> all <strong>of</strong> his works. He proclaimed<br />

that the evolutionary history <strong>of</strong> all things produced greater<br />

complexity and greater interdependence. Even before Darwin<br />

published the Origin <strong>of</strong> Species, Spencer wrote about<br />

the “survival <strong>of</strong> the fittest,” the phrase that Darwin later<br />

adopted to describe natural selection. Spencer had come<br />

close to the idea <strong>of</strong> natural selection, but he included it in<br />

a Lamarckian framework—that the efforts <strong>of</strong> organisms,<br />

including humans, could produce new characteristics that<br />

could be incorporated into their biological framework and<br />

passed down to future generations. Spencer was not the<br />

careful scientist that Darwin was; his scientific examples<br />

were few and vague. Since progress resulted from effort,<br />

then rich people were rich because they had superior abilities,<br />

and the poor were poor because they were lazy, or<br />

incompetent, or both, according to Spencer’s view. Spencer<br />

wrote in 1851:<br />

Blind to the fact that under the natural order <strong>of</strong><br />

things, society is constantly excreting its unhealthy,<br />

imbecile, slow, vacillating, faithless members, these<br />

unthinking, though well-meaning men advocate<br />

an interference which not only stops the purifying<br />

process but even increases the vitiation—absolutely<br />

encourages the multiplication <strong>of</strong> the reckless and<br />

incompetent by <strong>of</strong>fering them an unfailing provision,<br />

and discourages the multiplication <strong>of</strong> the competent<br />

and provident by heightening the prospective<br />

difficulty <strong>of</strong> maintaining a family.<br />

Spencer’s evolution proceeded by effort, while Darwin’s<br />

seemed to be founded upon luck. When Spencer visited<br />

America in 1882, the year Darwin died, he was immensely<br />

popular in this nation <strong>of</strong> newfound wealth resulting from<br />

the efforts <strong>of</strong> independent people exploiting a huge wilderness<br />

<strong>of</strong> resources they had recently expropriated from the<br />

Native Americans. When religious leaders such as Henry<br />

Ward Beecher embraced evolution within their theology, it<br />

was Spencer’s version, not Darwin’s. Spencer’s views encouraged<br />

the growth <strong>of</strong> social Darwinism and eugenics that<br />

were used as justification <strong>of</strong> the oppression <strong>of</strong> minorities

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