G. W. F. Hegel said: “Everything is what is not.” Throughout human history, we find a continuous struggle to define the other, the foreigner, the unknown, the opposite of we or I. And, as the quote from Hegel indicates, what they are, that we are not, helps define the frontiers of personal and group identity.
"Defining the Other,"
Human Architecture: Journal of the Sociology of Self-Knowledge:
2, Article 18.
Available at: http://scholarworks.umb.edu/humanarchitecture/vol2/iss2/18