Why would the Big Five personality dimensions have persisted in the human species?
◦ Humans form societies, and societal pressures cause these traits to persist.
◦ These traits are evolutionarily adaptive and therefore contribute to survival ability.
◦ Each of them places a limit on social interactions, thereby making it more likely that an individual member of the species will grow to adulthood.
◦ Each of these traits has a clearly identifiable genetic marker; therefore, all of them are present in all members of the species.