It is true, Julia, that humans are biologically inclined towards social interaction; that is, we are inherently social creatures. Despite this, some people experience a loss of energy while directly interacting with people, while others experience the opposite effect.
Typology theory classifies the first group as "introverts", and the second group as "extroverts" (or extraverts, as Jung preferred to call them).
Also, it seems unlikely to me that there could even exist a society comprised exclusively of introverts, as both groups appear to serve a purpose. However, I believe that, in the event that such a society existed, many people would begin to function like extroverts, in order to fulfill the necessary societal roles.
And thank you for chiming in!