IJournals: International Journal of Social Relevance & Concern ISSN-2347-9698 Volume 5 Issue 1 January 2017 © 2016, IJournals All Rights Reserved www.ijournals.in Page 13 From Bipolar to Unipolar: The Constant United States of America (USA) Global Foreign Policy and Its Implications Author: Thomas Otieno Juma (PhD Candidate – Political Science; Kisii University) Affiliation: Lecturer – Moi University, Dept. of History, Political Science, and Public Administration. Email: thomasotienojuma@yahoo.com ABSTRACT This paper sought to evaluate whether USA foreign policy from bipolar to unipolar is changing, in addition to its global implications. The periods following the World War II redefined the world politics dramatically. From the alliances hitherto formed and the outcomes from actions, decisions, and strategies jointly pursued, it became apparent that among the many antagonist – hostile states; one from both side of the great divide emerged with capability to cause real threat globally and to the opposite “perceived – equal” power. This scenario easily led to bipolarism which soon changed into unipolarism in favour of USA. By using two objectives; examining USA foreign policy during bipolar period, and analyzing USA foreign policy in the ensuing unipolar, this study uses descriptive design. Through exploration of available authoritative literature, I arrive at a conclusion that USA foreign policy under different polarisms has not quite changed except the international system structure and personalities involved in her foreign policy. Keywords: Polarism, Bipolar, Bipolarism, Unipolar, Unipolarism, USA, Foreign Policy, Cold War, International System. 1. INTRODUCTION The international system was very interesting and complex to evaluate up to the period extending to 1945. Many scholars see it comprising many state players. As Waltz (1979) point, ―Until 1945 the nation-state system was multi-polar, and always with five or more powers. ...‖. Complex to evaluate because many unpredictable players existed with no outright supreme power thus lines of real threats and hostilities could interestingly be expected to pop from anywhere. Prior to 1945 and the rise of USA and USSR to superpowerism, many other states had become and they were still forces to reckon with in international polity. Nye (Summer 1990) believe that "historically, the primary measure of a nation's power has been its military capability, be they Roman legions or Spanish tercios. Sixteenth- century Spain boasted of its trade with the Indies, the Far East, and especially with the colonies of the new world. A steady supply of raw materials, finished products, gold and silver made it possible for Spain to control the wealth, industry, and political aspects of the world. As economic power was to sixteenth century Spain's source of wealth, it