Sexual selection in humans

Sexual selection in human evolutionsexual selectionsexually selected
Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans.wikipedia
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Neoteny

neotenicpaedomorphicpaedomorphosis
The role of sexual selection in human evolution has not been firmly established although neoteny has been cited as being caused by human sexual selection.
These neotenic changes may have been brought about by sexual selection in human evolution.

Sexual selection

sexually selectedmale-male competitionintrasexual selection
Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans.
Darwin conjectured that heritable traits such as beards and hairlessness in different human populations are results of sexual selection in humans.

Human evolution

evolutionearly manevolution of humans
The role of sexual selection in human evolution has not been firmly established although neoteny has been cited as being caused by human sexual selection.

Khoisan

CapoidKhoi-SanCapoid race
Although not explicit, his observation that in Khoisan women "the posterior part of the body projects in a most wonderful manner" (known as steatopygia) implies sexual selection for this characteristic.
Charles Darwin wrote about the Khoisan and sexual selection in The Descent of Man in 1882, commenting that their steatopygia evolved through sexual selection in human evolution, and that "the posterior part of the body projects in a most wonderful manner".

Geoffrey Miller (psychologist)

Geoffrey MillerGeoffrey Miller (evolutionary psychologist)Miller
Geoffrey Miller, drawing on some of Darwin's largely neglected ideas about human behavior, has hypothesized that many human behaviors not clearly tied to survival benefits, such as humor, music, visual art, some forms of altruism, verbal creativity or the fact that most humans have a far greater vocabulary than that which is required for survival, Miller (2000) has proposed that this apparent redundancy is due to individuals using vocabulary to demonstrate their intelligence, and consequently their "fitness", to potential mates.
Geoffrey F. Miller (born 1965) is an American evolutionary psychologist, serving as an associate professor of psychology at the University of New Mexico who has researched sexual selection in human evolution.

Human penis size

penis sizepenile lengthmacrophallic
It has been suggested the evolution of the human penis towards larger size was the result of female choice rather than sperm competition, which generally favors large testicles.

Hypergamy

mesalliancehypergamousHypogamy
Evolutionary psychologists contend this is an inherent sex difference arising out of sexual selection, with men driven to seek women who will give birth to healthy babies and women driven to seek men who will be able to provide the necessary resources for the family's survival.

Charles Darwin

DarwinDarwinianCharles Robert Darwin
Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans.

Natural selection

selectionselectiveselected
Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans. Sexual selection's role in human evolution cannot be definitively established, as features may result from an equilibrium among competing selective pressures, some involving sexual selection, others natural selection, and others pleiotropy.

Human

humanshuman beinghuman beings
Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans.

Homo sapiens

anatomically modern humanshumananatomically modern human
It has been suggested that sexual selection played a part in the evolution of the anatomically modern human brain, i.e. the structures responsible for social intelligence underwent positive selection as a sexual ornamentation to be used in courtship rather than for survival itself, and that it has developed in ways outlined by Ronald Fisher in the Fisherian runaway model.

Ronald Fisher

R.A. FisherR. A. FisherFisher
It has been suggested that sexual selection played a part in the evolution of the anatomically modern human brain, i.e. the structures responsible for social intelligence underwent positive selection as a sexual ornamentation to be used in courtship rather than for survival itself, and that it has developed in ways outlined by Ronald Fisher in the Fisherian runaway model.

Fisherian runaway

runaway evolutionrunaway selectionFisher's runaway model
It has been suggested that sexual selection played a part in the evolution of the anatomically modern human brain, i.e. the structures responsible for social intelligence underwent positive selection as a sexual ornamentation to be used in courtship rather than for survival itself, and that it has developed in ways outlined by Ronald Fisher in the Fisherian runaway model.

Pleiotropy

pleiotropicmulti-symptompleiotropism
Sexual selection's role in human evolution cannot be definitively established, as features may result from an equilibrium among competing selective pressures, some involving sexual selection, others natural selection, and others pleiotropy.

Hair

glabrousglabrescenthuman hair
Charles Darwin conjectured that the male beard, as well as the hairlessness of humans compared to nearly all other mammals, were results of sexual selection.

Steatopygia

accumulation of fat on the buttocksghetto bootylarge buttocks
Although not explicit, his observation that in Khoisan women "the posterior part of the body projects in a most wonderful manner" (known as steatopygia) implies sexual selection for this characteristic.

The Descent of Man, and Selection in Relation to Sex

The Descent of ManDescent of ManThe Descent of Man and Selection in Relation to Sex
In The Descent of Man, and Selection in Relation to Sex, Darwin viewed many physical traits which vary around the world as being so trivial to survival that he concluded some input from sexual selection was required to account for their presence.

Photoprotection

photoprotectivephotoprotectantphotoprotective mechanisms
This idea closely relates to that of the suggested need for increased photoprotection and is part of the most-commonly-accepted scientific explanation for the evolution of pigmentary traits.

Homininae

homininehomininsGorilla–human last common ancestor
Studies have shown the earliest homininae were highly dimorphic and that this tendency lessened over the course of human evolution, suggesting humans have become more monogamous. In contrast, gorillas living in harems exhibit a much stronger sexual dimorphism (see: homininae).

Gorilla

Silverback gorillagorillassilverback
In contrast, gorillas living in harems exhibit a much stronger sexual dimorphism (see: homininae).

Human body

bodyhuman anatomyhuman physiology
The theory of sexual selection has been used to explain a number of human anatomical features.

Facial hair

facialfacepogonotrophy
These include rounded breasts, facial hair, pubic hair and penis size.