While the term of region has been typically defined “as geographically proximate and interdependent states” and the term of regionalism “as attempts at formal cooperation between such states”, it is evident that for many scholars who study on the subject of region and regionalism “these definitions are today too narrow”. The resurrection and re-definition of ‘regionalism’ are among the prominent trends in the international studies of the present times. Regionalism has been brought back into the academic studies as well as the policy debates after some decades of neglect.