The thesis tries to explain main development progresses of liberalization of trade with its causalities. Two main trade strategies took part of the thesis, which are import substitution strategies and export oriented growth strategies. The effects of both strategies and liberalization process are clarified with the special case study of the Turkey. Furthermore brief history of Turkish economic and trade policies were expressed with some further analysis. The recent past years of Turkey also were touched on the thesis to generate ideas of today’s Turkish economy with future perspective.