Saudi Arabia and Iran first started making progress on peace with each other over six years ago, when Russia hosted leaders from both countries in Moscow. Those meetings started several years of rhetorical outreach for peace between the Iranian and Saudi governments.
The populations of Iran and Saudi Arabia get along well. Tens of thousands of Saudi Arabians & Iranians pray peacefully together every year at the Hajj, a pilgrimage to Mecca in Saudi Arabia. So the governments are following the lead of their populations in being at peace with one another in Yemen and throughout the Persian Gulf and Middle East.
Yemen borders Saudi Arabia and is easily reached from Iran. There was initially more internal conflict there than anywhere else on earth. Poverty precipitated instability. The country then attracted others to the fight because Yemen is located along a waterway that's important to global trade. Regional and foreign superpowers became involved, and supported opposing sides. One proxy sought a parliamentary democracy similar to Iran's and China's, and the other a president or king very friendly to the royal government in Saudi Arabia. Resolving those differences peacefully wasn't an easy task. So the United States, China, Iran and Saudi Arabia deserve tremendous credit for working together for stability there. Russia deserves credit, too.
According to newspaper reports, there were over a hundred thousand casualties in Yemen over the course of a decade. Many political prisoners were also taken. Yemen recently freed them all. Close to a thousand people were released in March 2023, a historic development that shows that real peace is developing.
United Nations member states can support the Yemen people in this progress. Perhaps a lasting peace treaty can be reached for Yemen that formalizes the peace that's occurring there. Yemen may also need humanitarian aid for at least several years. The Saudi and Iranian governments can't support the people on their own. Yemen may appreciate and need the involvement of additional countries.