This paper is an analysis of colonialism and its legacy in The Shadow Lines by Amitav Ghosh. He is one of the prominent voices of Indian Writing in English. He does not believe in National borders and geographical boundaries that divide and separate the countries and its people under the pretext of religion and community. The identity crisis of marginal groups, their exploitation and oppression, displacement, nostalgia and loss of language and culture are the predominant issues related to colonialism in The Shadow Lines. Colonialism led us to partition, terror, violence, fear, hatred, devastation and pathos. The colonial encounter has been a seminal event in the history of both the west and the non western world, shaping culture, literature, politics and history. The colonial ambivalenceis comprisedof materialismand spirituality that are otherwise considered as the economicaland the cultural identity.