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→Evolution of beauty
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Even more obviously, the peacock tail is unnecessarily complex and specific. | Even more obviously, the peacock tail is unnecessarily complex and specific. | ||
Several explanations can be provided for these shapes: | Several explanations can be provided for these shapes: | ||
Either there are functional constraints preventing a simpler shape,<ref>Price T, Langen T. 1992. ''Evolution of correlated characters.'' [[https://www.ncbi.nlm.nih.gov/pubmed/21236041 Abstract]]</ref> | Either (1) there are functional constraints preventing a simpler shape,<ref>Price T, Langen T. 1992. ''Evolution of correlated characters.'' [[https://www.ncbi.nlm.nih.gov/pubmed/21236041 Abstract]]</ref> | ||
or these precise shapes are an honest signal of e.g. health, mutational load and intelligence, can thus signal ''good genes'' overall, | or (2) these precise shapes are an honest signal of e.g. health, mutational load and intelligence, can thus signal ''good genes'' overall, | ||
or feedback loops in sexual selection such as [[Fisherian runaway]] and ''sensory bias''<ref>Fuller, R. C., Houle, D., & Travis, J. 2005. ''Sensory Bias as an Explanation for the Evolution of Mate Preferences.'' [[https://www.jstor.org/stable/10.1086/444443 Abstract]]</ref> | or (3) feedback loops in sexual selection such as [[Fisherian runaway]] and ''sensory bias''<ref>Fuller, R. C., Houle, D., & Travis, J. 2005. ''Sensory Bias as an Explanation for the Evolution of Mate Preferences.'' [[https://www.jstor.org/stable/10.1086/444443 Abstract]]</ref> | ||
resulted in arbitrary shapes becoming increasingly sexually attractive, which in turn, overcomplicated or exaggerated them. | resulted in arbitrary shapes becoming increasingly sexually attractive, which in turn, overcomplicated or exaggerated them. | ||
Such feedback loops can also explain the ''immense sexual attraction'' to superficial traits that humans exhibit, which have barely any relevance for survival except "social survival". | Such feedback loops can also explain the ''immense sexual attraction'' to superficial traits that humans exhibit, which have barely any relevance for survival except "social survival". | ||