Evolutionary basis
Evolutionary psychology
has attempted to provide various reasons for love as a survival tool.
Humans are dependent on parental help for a large portion of their
lifespans comparative to other mammals. Love has therefore been seen as a
mechanism to promote parental support of children for this extended
time period. Another factor may be that
sexually transmitted diseases can cause, among other effects, permanently reduced
fertility, injury to the fetus, and increase complications during
childbirth. This would favor monogamous relationships over polygamy.
[2
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