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<span id="zyzz"></span>[[File:Buff.jpg|thumb|right|One popular sex icon for men: Zyzz, died young of sudden cardiac arrest from too much steroid use to make himself look hyper-masculine. He was not a [[reproductive success]]. | <span id="zyzz"></span>[[File:Buff.jpg|thumb|right|One popular sex icon for men: Zyzz, died young of sudden cardiac arrest from too much steroid use to make himself look hyper-masculine. He was not a [[reproductive success]].]] | ||
'''Fisherian runaway''' is a mechanism by which [[sexual selection]] leads to exaggerated physical traits (ornamentation), potentially to the extent of [[maladaptiveness]] and reduced population viability,<ref>Encyclopedia of Ecology, By Brian D. Fath, page 316 https://books.google.com/books?hl=en&lr=&id=x1h7DwAAQBAJ&oi=fnd&pg=PA310&dq=%22fisherian+runaway%22+extinction+%22selection%22&ots=cq04BIA2Lf&sig=Otp5RbC3B_5W1ZR7Q3zGjPOe7uA#v=onepage&q=fisherian%20runaway&f</ref> or even extinction.<ref>The evolution of sexual strategy in modern humans: an interdisciplinary approach by Collins, Kendra Marie, https://studyres.com/doc/2550939/--california-state-university</ref><ref>Moen et al., 1999</ref> | '''Fisherian runaway''' is a mechanism by which [[sexual selection]] leads to exaggerated physical traits (ornamentation), potentially to the extent of [[maladaptiveness]] and reduced population viability,<ref>Encyclopedia of Ecology, By Brian D. Fath, page 316 https://books.google.com/books?hl=en&lr=&id=x1h7DwAAQBAJ&oi=fnd&pg=PA310&dq=%22fisherian+runaway%22+extinction+%22selection%22&ots=cq04BIA2Lf&sig=Otp5RbC3B_5W1ZR7Q3zGjPOe7uA#v=onepage&q=fisherian%20runaway&f</ref> or even extinction.<ref>The evolution of sexual strategy in modern humans: an interdisciplinary approach by Collins, Kendra Marie, https://studyres.com/doc/2550939/--california-state-university</ref><ref>Moen et al., 1999</ref> | ||
The name Fisherian runaway derives from the originator of the concept, Ronald Fisher, the 20th century British statistician, geneticist, eugenicist and racialist. | The name Fisherian runaway derives from the originator of the concept, Ronald Fisher, the 20th century British statistician, geneticist, eugenicist and racialist. | ||
Fisherian runaway is a popular meme in the [[manosphere]] used to argue women's mate choices may be maladaptive, resulting in excessive emphasis on courtship and selecting exaggerated anti-social traits that incite male competition. Fisherian runaway is often misunderstood to refer to exaggerating appearance as lifestyle choice, but it actually refers to ''evolving'' more exaggerated appearance over many generations. However, sexual preferences evolved this way can motivate extreme body modifications like breast enlargement, hormone supplements and bodybuilding. | Fisherian runaway is a popular meme in the [[manosphere]] used to argue women's mate choices may be maladaptive, resulting in excessive emphasis on courtship and selecting exaggerated anti-social traits that incite male competition. Fisherian runaway is often misunderstood to refer to exaggerating appearance as lifestyle choice, but it actually refers to ''evolving'' more exaggerated appearance over many generations. However, sexual preferences evolved this way can motivate extreme body modifications like breast enlargement, hormone supplements and bodybuilding. | ||
==Explanation== | ==Explanation== | ||
[[File:Peacock courting peahen.jpg|alt=|thumb|"The females may be dull looking, but they're very picky." A peacock courting a peahen]] | |||
=== Positive feedback === | === Positive feedback === | ||
Fisherian runaway is a selection process occurring over many generations, in which the one sex (either male or female) becomes more choosy about a heritable trait for the simple reason that it will make the offspring more attractive. As the the choosiness for the trait increases, the selective pressure to prefer the trait increases too, forming a [https://en.wikipedia.org/wiki/Positive_feedback_loop positive feedback loop]. In response to the increased choosiness, the other sex evolves to enlarge, overcomplicate or beautify that trait in efforts of becoming more attractive, eliciting [https://en.wikipedia.org/wiki/Supernormal_stimulus super-stimuli] in the opposite sex. The exponential nature of positive feedback loops exerts a strong selection pressure that the resulting exaggerate may reduce mobility and increase vulnerability to predators and to sudden environmental changes. | Fisherian runaway is a selection process occurring over many generations, in which the one sex (either male or female) becomes more choosy about a heritable trait for the simple reason that it will make the offspring more attractive. As the the choosiness for the trait increases, the selective pressure to prefer the trait increases too, forming a [https://en.wikipedia.org/wiki/Positive_feedback_loop positive feedback loop]. In response to the increased choosiness, the other sex evolves to enlarge, overcomplicate or beautify that trait in efforts of becoming more attractive, eliciting [https://en.wikipedia.org/wiki/Supernormal_stimulus super-stimuli] in the opposite sex. The exponential nature of positive feedback loops exerts a strong selection pressure that the resulting exaggerate may reduce mobility and increase vulnerability to predators and to sudden environmental changes. | ||