The Dress, and the inevitabilaty of war

Throughout our lives we will always be in sides, whether born into them, put into them by other people or gladly declared by ourselves. There are many similar words to side, I like faction, gang, troop, team and organisation. Life has a habit of putting us into a side and some may spend their entire life being judged on it for the worse and spend forever trying to escape it.

What do I mean by this?