Identity
Everyone seems to feel the need for some way to identify themselves in a complex and variable world. What exactly should "identity" entail? Is it more about who you are as a person, right now, or is more about "what" you are, in the sense of your heritage and cultural background?
Culture, religion, and ethnicity have historically been primary factors used by people in deciding what their identity "really" is. Essentially, when this occurs, people focus less on things like their personality or profession and more upon accidents of birth. If a person happen to be born into a family whose ancestors lived in some geographic location, she "identifies" with that location - its culture, its religion, etc. A new and growing factor in how people identify themselves has been created by modern technology: genetics.
People are beginning to avail themselves of this technology to learn more about their genetic heritage. Presumably, by learning that their genetic codes contain markers for this or that ethnic group, they then learn something about who and what they are. Rather than forging a very personal identity through their own relationships, their profession, and the ideas they develop in their minds, they are looking to attach themselves to a communal identity they can share with others based upon genetic information.
When a person imagines that a group they are trying to identify with actually constitutes their identity, then they lose themselves in that group.
How does a person establish and maintain an identity?
Source: about.com