So far, I found difficult to answer to my question why do we need identity. I read two books and waiting for the rest to come from amazon.
My first book “Facebook et moi et moi et moi” aqnswer to sell representation to the society behind a social network: Facebook. Also answer to the opportunity to rebirth ourself and control our fake identity.
My second book “Identity sociological perspectives”answer to Individual identity in a social context and what do we define as identity?