Cautious Optimism Worldwide After US-Iran Deal, as Questions Remain Over Nuclear Talks and Lebanon

A tentative peace agreement between the United States and Iran has sparked cautious optimism around the world, with political leaders, international organizations, and regional governments welcoming what they describe as an important opportunity to end months of conflict and restore stability to global energy markets.

The preliminary memorandum, which is expected to be formally signed in Switzerland later this week, would establish a 60-day ceasefire, reopen the Strait of Hormuz to international shipping, and launch broader negotiations on Iran’s nuclear program and sanctions relief. While many details remain unclear, the announcement immediately triggered a decline in oil prices and raised hopes that disruptions to global trade and energy supplies could begin to ease.

US President Donald Trump celebrated the breakthrough on social media, writing, “Ships of the world, start your engines!” The agreement was also recognized by Tehran, a development many analysts viewed as significant after months of failed diplomatic efforts.

Despite the positive reaction, fighting has not completely stopped. Israeli artillery and airstrikes reportedly continued overnight in southern Lebanon, with Lebanese media reporting attacks near the city of Nabatiyeh. Local authorities warned residents not to return to affected areas because of ongoing security risks. The Israeli military said it intercepted a drone launched from Lebanon but did not immediately comment on the reported strikes.

Israel’s Defense Minister Israel Katz made clear that Israel would not withdraw from territory seized in southern Lebanon and warned that any Iranian response linked to Israeli operations against Hezbollah would be met with force. His remarks highlighted the uncertainty surrounding whether the broader regional conflict will be fully addressed by the agreement.

Lebanese officials reacted positively but cautiously. Parliament Speaker Nabih Berri, a Hezbollah ally who has served as an intermediary with Washington, welcomed what he described as an essential commitment to ending Israeli attacks on Lebanon. President Joseph Aoun expressed hope that the agreement would bring a “definitive end” to hostilities and praised the understanding for recognizing Lebanon’s security as part of broader regional stability efforts. At the same time, Lebanese security officials noted that Beirut had not been informed of the precise terms or timing of the ceasefire arrangements.

The United Nations also welcomed the development. UN High Commissioner for Human Rights Volker Türk called the announcement an important step and urged all parties to act responsibly. “At this fragile moment it is clear all sides need to exercise maximum restraint and work to implement the agreement reached quickly and in good faith,” he said. Türk also called for an end to fighting in Lebanon and demanded investigations into possible violations of international law.

Across Europe, leaders described the agreement as promising but emphasized that implementation would determine its success. European Commission President Ursula von der Leyen said the immediate priority was the full and rapid execution of the deal. She stressed that shipping through the Strait of Hormuz must resume, negotiations on Iran’s nuclear activities must continue, and violence in Lebanon must stop.

“There can be no peace in the Middle East while Lebanon is in flames,” von der Leyen said, calling for respect for Lebanon’s sovereignty and territorial integrity.

British Prime Minister Keir Starmer similarly described the agreement as a potentially major breakthrough while warning that much work remained ahead. “Nothing is guaranteed, but it is a very significant breakthrough,” he said. German Chancellor Friedrich Merz and French President Emmanuel Macron also supported the initiative and urged swift implementation.

China welcomed the reopening of diplomatic channels and expressed hope that commercial traffic through the Strait of Hormuz would resume as quickly as possible. Beijing also praised Pakistan’s mediation efforts. Pakistani Prime Minister Shehbaz Sharif, whose government played a central role in facilitating contacts between Washington and Tehran, hailed the understanding as a historic achievement.

“Today, the world has seen a historic step toward peace,” Sharif told lawmakers. “After the darkness of war, the sun of peace has risen.”

Saudi Arabia and Qatar also endorsed the announcement. Riyadh said the agreement could provide a foundation for broader negotiations while emphasizing the need to protect the security interests of regional states and uphold the principle of non-interference. Qatar, whose economy relies heavily on energy exports through the Strait of Hormuz, described the development as an important move toward sustainable peace and stronger economic growth.

European Union foreign policy chief Kaja Kallas called the memorandum a “potential breakthrough” that could create space for deeper talks on Iran’s nuclear activities and other regional issues. She noted that a successful implementation could help ease the global energy crisis and said the EU stood ready to contribute diplomatic expertise and economic leverage to support a lasting settlement.

While world leaders focused on the possibilities created by the agreement, analysts warned that the most difficult issues remain unresolved. The future of Iran’s nuclear program, the fate of its enriched uranium stockpiles, sanctions relief, missile development, and Tehran’s support for regional proxy groups are all expected to dominate negotiations during the 60-day ceasefire period.

Vice President JD Vance argued that the agreement effectively eliminates the nuclear threat posed by Iran, declaring, “What the president has really set us to do is certainly eliminate the nuclear threat of Iran. That’s done.” However, many experts questioned whether such a conclusion is justified before detailed negotiations have even begun.

Observers also pointed to emerging disagreements over the meaning of the memorandum. Washington insists that any sanctions relief or release of frozen Iranian assets will depend on Tehran’s compliance, while Iranian officials argue that financial measures must begin before the ceasefire process fully takes effect.

Analysts say the agreement may represent less a final settlement than a pause in hostilities. Some described it as a return to a cold-war-style confrontation rather than a complete resolution of the conflict. Questions also remain about whether the reopening of the Strait of Hormuz simply restores conditions that existed before the war and whether the enormous human and economic costs of the conflict produced lasting strategic gains.

The war has already claimed the lives of American service members, Iranian civilians, and numerous victims across the region while contributing to a global energy shock that pushed fuel prices higher and intensified inflationary pressures. Although the announcement has raised hopes that those pressures may begin to ease, energy analysts caution that repairing disrupted supply chains and restoring normal trade flows could take months.

For Trump, the success or failure of the agreement may carry major political consequences. A reduction in energy prices could provide economic relief and strengthen his position domestically, but critics argue that the conflict itself could have been avoided. Supporters, meanwhile, contend that if the upcoming negotiations ultimately deliver verifiable limits on Iran’s nuclear ambitions, the agreement could become one of the most significant foreign policy achievements of his presidency.

For now, the deal remains a framework rather than a final settlement. Its future will depend not on the announcement itself, but on whether the ceasefire holds, negotiations advance, and the deep mistrust that has defined US-Iran relations for decades can be overcome.