This book presents an overview of the main changes in the United States' foreign policy in response to the transformations in the international order in the last decades. If, after the end of the Cold War, the USA invested in the universalization of market economy and in the strengthening of its military supremacy, new developments demanded reorientations in the country’s foreign strategy. The controversial military interventions in Afghanistan and Iraq, the 2008 economic crisis, the rise of the BRICs (Brazil, Russia, India and China) and the rise of right-wing populism altered the global...