The decline of US Diplomacy - Implications for US global leadership

Authors

  • Deborah McCarthy Finnish Institute of International Affairs

Keywords:

the United States, diplomacy, soft power, global leadership

Abstract

Diplomacy has been a cornerstone of US global leadership in the post-Cold War era. The Trump Administration has dismantled long-standing foreign policy institutions, sharply reduced foreign assistance, and shifted foreign policy decision-making toward the 
executive branch. At the same time, it has moved away from multilateralism in favour of a transactional foreign policy centred on personalised presidential diplomacy, bilateral deals, and the use of coercive economic measures. Together, these changes have weakened US global leadership. They have reduced American soft power, eroded global trust, undercut US influence in global norm setting, and diminished the country’s ability to monitor and respond to global developments. Although the US continues to have unmatched military power and economic leverage, a sustained withdrawal from development assistance, public diplomacy and multilateral forums, especially on transnational challenges, is likely to accelerate competition over the future rules and norms of the international order. As China rapidly expands its global initiatives and India, Brazil and other BRICS countries press for reforms of international institutions, the liberal character of the global order will very much depend on how US allies and partners take up the reins in response to the US retreat.

Author Biography

  • Deborah McCarthy, Finnish Institute of International Affairs

    Ambassador Deborah McCarthy (ret) is a non-Resident Senior Fellow at the Center for European Policy Analysis and at the Finnish Institute of International Affair.

    She is an expert on U.S. foreign and national security policy.  Most recently, she was the U.S. negotiator to the United Nations Ad Hoc Committee on Cybercrime (2022-2025) leading U.S diplomatic efforts with allies and partners which successfully concluded a new global UN Cybercrime Convention.   Just prior, she was a Fellow at Harvard’s Advanced Leadership Initiative (2020-2022) focusing on cyber and technology and  was the host and producer of the podcast series “The General and the Ambassador”.  

    In a long diplomatic career, she served as Ambassador to Lithuania (2013-2016), Principal Deputy Assistant Secretary for Economic and Business Affairs, Deputy Chief of Mission in Athens, Greece, Special Coordinator for Venezuela, Deputy Assistant Secretary in the Bureau of Narcotics and Law Enforcement Affairs, Consul General in Montreal, Deputy Chief of Mission in Nicaragua and Economic Counselor in Paris.  Other postings include Rome, Haiti and the Dominican Republic.

    Amb. McCarthy is a member of the American College of National Security Leaders and the American Academy of Diplomacy.  She serves on the Advisory Board of the Master’s Program of the School of Foreign Service at Georgetown University and is a Fellow and Senior Editor for the Harvard Social Impact Review.  

     

    Amb. McCarthy holds a M.S. in Foreign Service and a M.A. in Economics from Georgetown University and a B.A. in Economics from the University of Virginia.  She is trilingual.

     

     

     

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Published

2026-04-14