The Iran nuclear agreement of 2015, also known as the Joint Comprehensive Plan of Action (JCPOA), was a landmark accord aimed at preventing Iran from obtaining nuclear weapons.

The agreement was signed by Iran, the U.S., the U.K., France, Germany, Russia, and China. Under the terms of the agreement, Iran would limit its nuclear activities and allow for inspections by the International Atomic Energy Agency (IAEA) in exchange for the lifting of economic sanctions imposed on Iran.

The agreement was seen as a major success for international diplomacy and a potential turning point in the long-standing tensions between Iran and the Western world. However, the agreement was highly controversial, and critics argued that it did not do enough to prevent Iran from continuing to develop its nuclear capabilities.

In May 2018, the U.S. under President Trump withdrew from the agreement and reinstated economic sanctions on Iran. This move was met with international condemnation and concerns about the potential for Iran to resume its nuclear activities.

Despite the U.S. withdrawal, the other signatories to the agreement have continued to support the JCPOA and have sought to find ways to keep it in place. In 2021, the U.S. under President Biden expressed a willingness to rejoin the agreement, but negotiations have been complicated by the ongoing tensions between the two countries.

The future of the Iran nuclear agreement remains uncertain, but its impact on international relations and efforts to prevent the proliferation of nuclear weapons cannot be overstated. As the world continues to grapple with issues of nuclear security and nonproliferation, the Iran nuclear agreement of 2015 will undoubtedly continue to be a topic of debate and discussion for years to come.