What are the origins of Social Differences?

Birth is the main cause for social differences. There may be many drawbacks in it, as one cannot change this. We belong to a community simply because we were born into it. We experience the social differences based on accident of birth in our everyday lives. Social differences exist due to gender differences; physical attributes and due to different physical abilities or disabilities. A few differences are based on our choices. Education, profession and economic standards also create social difference. All these lead to formation of social groups that are based on individual choices.