colonialism is an important factor in cultural production and many of cultural constructs all over the world. english and english language teaching are at the center of the contemporary world. postcolonial literature, the genre achebe exercised, is a kind of historical text which has become central to different debates and criticisms. in this thesis, different elements related to the colonialism, post-colonialism and their actualization in achebe’s selected novels will be discussed to indicate that the process of colonization was not done merely by white colonizers but with the help of colonized people as well. this research uses achebe’s works to introduce colonial subjects and show how achebe portrays them to get this conclusion that african colony was not shaped by outside forces but from within. in chapter one an introduction to the post-colonial studies and colonialism as well as other related phenomena such as creation of the “other”, colonized acceptance of their inferiority, and the role of language in colonization are given. in chapter two, biographical information of achebe and his significance in foundation of african literature, his emphasis on writers’ social commitment, his use of language and his literary heritage are presented. chapter three is devoted to things fall apart. to demonstrate how colonized subjects themselves were effective in the process of colonization different communal and personal qualities of african people are going to be analyzed with regards to theories of critics such as frantz fanon, david carroll, killam and eustace palmer. chapter four is devoted to achebe’s two other novels, no longer at ease and arrow of god. the first section analyzes no longer at ease and the tension between traditional and modern in an educated west african with regard to obi okonkwo and his lack of personality. in the second section, arrow of god and the theme of destruction of the tribal world are given in a more complex way than the previous novels. the terminal chapter wraps up the whole thesis and uses all the information given in the previous chapters to present the significance of the research.