The research article explores the concepts of Ethnocentrism and Exogamy practices among the people from the mythological period till present time in Indian Writing in English. The article also explores the changes that these practices had undergone over the years and substantiate the effects of this practices that is still prevalent in a brand new forms among the people in the present society. The effect of these two concepts in the mythological period can better explain through two theories namely Social Dominance theory and Social Identity theory.