Alceste
Vagabond
What the smile benefits the species ?
Why we need to smile ? how it was evolved ?
Would you please rephrase your statement ?
Does smiling help in the survival and reproduction of the species ?
Yes. Social bonding behavior in general is beneficial because we are a social species. One of the advantages of being a social species is that a group can defend against predators more easily than an individual. Also, since human females are pretty much constantly in estrus, living communally offers an abundance of mating opportunities.