Ban Ki-moon Urged U.S. to Rejoin Paris Agreement
The former UN leader called for the United States to return to the global climate accord following its 2026 exit.
Updated on Oct. 14, 2026 in International Relations
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Former United Nations Secretary-General Ban Ki-moon has urged the United States to rejoin the Paris Climate Agreement. He emphasized that the U.S. plays a critical role as a leader in international diplomacy.
Why it matters
Ban argues that the recent U.S. withdrawal from the accord and other international bodies creates significant strain on the global community. He maintains that American involvement remains essential for effective collective action.
The United States formally exited the Paris Climate Agreement in January 2026, marking its second withdrawal since 2019. This follows a broader trend in which the U.S. has pulled out of 66 international organizations under President Donald J. Trump.
The players
Ban Ki-moon
He is a South Korean diplomat who served as the eighth Secretary-General of the United Nations from 2007 to 2016.
Donald J. Trump
He is the current President of the United States.
Joe Biden
He is a former President of the United States who previously reversed the country's withdrawal from the climate accord.
United Nations
It is an international organization founded in 1945 that currently consists of 193 member states.
The details
Speaking at a Harvard University forum, Ban Ki-moon highlighted the impact of the U.S. departure on global relations. He noted that the United Nations Security Council includes 193 member states, but only five permanent members hold the veto power to block resolutions.
Timeline
Ban Ki-moon served as United Nations Secretary-General from 2007 to 2016.
The United States withdrew from the Paris Climate Agreement in November 2019.
The United States reversed the Paris Climate Agreement withdrawal in 2021.
President Donald J. Trump withdrew the United States from the Paris Climate Agreement again in January 2025.
The U.S. withdrawal from the Paris Climate Agreement took effect in January 2026.
Political Context
Opponents of rejoining the agreement often emphasize national sovereignty and argue that international climate mandates place an unfair economic burden on the American domestic industry. These critics maintain that the U.S. should prioritize independent energy policy over multilateral environmental commitments.
The U.S. withdrawal from international climate agreements can influence domestic environmental regulations and the cost of energy compliance for businesses. These shifts may ultimately affect tax policies and the regulatory environment for taxpayers across the country.
The takeaway
Diplomatic efforts by former officials underscore the ongoing tension between national policy shifts and long-term global commitments. Readers should monitor how international organizations adjust their frameworks when major contributors change their membership status.
Further reading
For more background on how U.S. policy influences global affairs, visit the International Relations section.
Source note: This article includes information reported by The Harvard Crimson.
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