To what extent the island is an allegory/microcosm of society at large in the series "Lost"?What are the different aspects of insular society...

The island can be seen as a microcosm of society.  In its
most symbolic form, the island can be seen as a pure state of nature.  The idea of the
passengers aboard the plane being set adrift on this island and seeking to navigate
through the demands living on it help to bring out the idea of how human beings can work
through the state of nature.  This also helps to bring out much of the personality
differences that are present.  The notion of an insular social order is brought out by
the island because it is the backdrop where so much of human reality is evoked.  The
idea of having to work together in the first season and the meeting of "the Others"
assists in highlighting the ideas of how insular social orders work when working through
other insular notions of the social good.  The island might be its own character in that
it provides the backdrop upon which all of these challenges are
navigated.